In this task, you are given a context, a subject, a relation, and many options. Based on the context, from the options select the object entity that has the given relation with the subject. Answer with text (not indexes).

Ex Input:
Context: In signal processing, the impulse response, or impulse response function (IRF), of a dynamic system is its output when presented with a brief input signal, called an impulse. More generally, an impulse response is the reaction of any dynamic system in response to some external change. In both cases, the impulse response describes the reaction of the system as a function of time (or possibly as a function of some other independent variable that parameterizes the dynamic behavior of the system)., In signal processing, a digital filter is a system that performs mathematical operations on a sampled, discrete-time signal to reduce or enhance certain aspects of that signal. This is in contrast to the other major type of electronic filter, the analog filter, which is an electronic circuit operating on continuous-time analog signals., Infinite impulse response (IIR) is a property applying to many linear time-invariant systems. Common examples of linear time-invariant systems are most electronic and digital filters. Systems with this property are known as "IIR systems" or "IIR filters", and are distinguished by having an impulse response which does not become exactly zero past a certain point, but continues indefinitely. This is in contrast to a finite impulse response (FIR) in which the impulse response "h"("t") "does" become exactly zero at times "t" > "T" for some finite "T", thus being of finite duration., In signal processing , a finite impulse response ( FIR ) filter is a filter whose impulse response ( or response to any finite length input ) is of finite duration , because it settles to zero in finite time . This is in contrast to infinite impulse response ( IIR ) filters , which may have internal feedback and may continue to respond indefinitely ( usually decaying ) . The impulse response ( that is , the output in response to a Kronecker delta input ) of an Nth - order discrete - time FIR filter lasts exactly N + 1 samples ( from first nonzero element through last nonzero element ) before it then settles to zero . FIR filters can be discrete - time or continuous - time , and digital or analog ., Information is that which informs. In other words, it is the answer to a question of some kind. It is thus related to data and knowledge, as data represents values attributed to parameters, and knowledge signifies understanding of real things or abstract concepts. As it regards data, the information's existence is not necessarily coupled to an observer (it exists beyond an event horizon, for example), while in the case of knowledge, the information requires a cognitive observer., Signal processing is an enabling technology that encompasses the fundamental theory, applications, algorithms, and implementations of processing or transferring information contained in many different physical, symbolic, or abstract formats broadly designated as "signals". It uses mathematical, statistical, computational, heuristic, and linguistic representations, formalisms, and techniques for representation, modelling, analysis, synthesis, discovery, recovery, sensing, acquisition, extraction, learning, security, or forensics., Subject: finite impulse response, Relation: subclass_of, Options: (A) being (B) case (C) change (D) duration (E) electronic circuit (F) electronic filter (G) event (H) feedback (I) filter (J) heuristic (K) information (L) invariant (M) property (N) question (O) representation (P) security (Q) signal (R) time (S) type

Ex Output:
electronic filter


Ex Input:
Context: An electric light is a device that produces visible light by the flow of electric current. It is the most common form of artificial lighting and is essential to modern society, providing interior lighting for buildings and exterior light for evening and nighttime activities. In technical usage, a replaceable component that produces light from electricity is called a lamp. Compact lamps are commonly called light bulbs; for example, the incandescent light bulb. Lamps usually have a base made of ceramic, metal, glass or plastic, which secures the lamp in the socket of a light fixture. The electrical connection to the socket may be made with a screw-thread base, two metal pins, two metal caps or a bayonet cap., Night skiing is the sport of skiing or snowboarding after sundown, offered at many ski resorts and mountains. There are usually electric lights  including LED lamps  along the piste which allow for better visibility. It typically begins after a resort's skiing-day ends (sunset), and ends between 8:00 and 10:30 p.m., Sunset or sundown, is the daily disappearance of the Sun below the horizon as a result of Earth's rotation.
The Sun will set exactly due west at the equator on the the spring and fall equinoxes, each of which occurs only once a year. 
The time of sunset is defined in astronomy as the moment when the trailing edge of the Sun's disk disappears below the horizon.
Near to the horizon, atmospheric refraction causes the ray path of light from the Sun to be distorted to such an extent that geometrically the Sun's disk is already about one diameter below the horizon when sunset is observed. , Skiing is a mode of transport, recreational activity and competitive winter sport in which the participant uses skis to glide on snow. Many types of competitive skiing events are recognized by the International Olympic Committee (IOC), and the International Ski Federation (FIS)., A ski resort is a resort developed for skiing, snowboarding, and other winter sports. In Europe, most ski resorts are towns or villages in or adjacent to a ski area  a mountainous area with pistes, ski trails and a ski lift system. In North America, it is more common for ski areas to exist well away from towns, so ski resorts usually are destination resorts, often purpose-built and self-contained, where skiing is the main activity., Montana is a state in the Western region of the United States. The state's name is derived from the Spanish word (mountain). Montana has several nicknames, although none official, including "Big Sky Country" and "The Treasure State", and slogans that include "Land of the Shining Mountains" and more recently "The Last Best Place". Montana has a border with three Canadian provinces: British Columbia, Alberta, and Saskatchewan, the only state to do so. It also borders North Dakota and South Dakota to the east, Wyoming to the south, and Idaho to the west and southwest. Montana is ranked 4th in size, but 44th in population and 48th in population density of the 50 United States. The western third of Montana contains numerous mountain ranges. Smaller island ranges are found throughout the state. In total, 77 named ranges are part of the Rocky Mountains. The eastern half of Montana is characterized by western prairie terrain and badlands., Idaho is a state in the northwestern region of the United States. It borders the state of Montana to the east and northeast, Wyoming to the east, Nevada and Utah to the south, and Washington and Oregon to the west. To the north, it shares a small portion of the Canadian border with the province of British Columbia. With a population of around 1.7 million people and an area of , Idaho is the 14th largest and 39th most populous of the 50 states. The state's capital and largest city is Boise., South Dakota is a state located in the Midwestern region of the United States. It is named after the Lakota and Dakota Sioux Native American tribes, who compose a significant portion of the population and historically dominated the entire territory. South Dakota is the 17th most expansive, but the 5th least populous and the 5th least densely populated of the 50 United States. Once the southern portion of the Dakota Territory, South Dakota became a state on November 2, 1889, simultaneously with North Dakota. Pierre is the state capital and Sioux Falls, with a population of about 171,000, is South Dakota's largest city., Nebraska is a state that lies in both the Great Plains and the Midwestern United States. The state is bordered by South Dakota to the north, Iowa to the east and Missouri to the southeast, both across the Missouri River, Kansas to the south, Colorado to the southwest and Wyoming to the west. Its area is just over 77,220 sq mi (200,000 km) with almost 1.9 million people. Its state capital is Lincoln. Its largest city is Omaha, which is on the Missouri River., Utah (or ) is a state in the western United States. It became the 45th state admitted to the U.S. on January 4, 1896. Utah is the 13th-largest by area, 31st-most-populous, and 10th-least-densely populated of the 50 United States. Utah has a population of more than 3 million (Census estimate for July 1, 2016), approximately 80% of whom live along the Wasatch Front, centering on the state capital Salt Lake City. Utah is bordered by Colorado to the east, Wyoming to the northeast, Idaho to the north, Arizona to the south, and Nevada to the west. It also touches a corner of New Mexico in the southeast., Wyoming is a state in the mountain region of the western United States. The state is the tenth largest by area, the least populous and the second least densely populated state in the country. Wyoming is bordered on the north by Montana, on the east by South Dakota and Nebraska, on the south by Colorado, on the southwest by Utah, and on the west by Idaho. Cheyenne is the capital and the most populous city in Wyoming, with a population estimate of 63,335 in 2015. The state population was estimated at 586,107 in 2015, which is less than the population of 31 of the largest U.S. cities., An LED lamp is a light-emitting diode (LED) product which is assembled into a lamp (or light bulb) for use in lighting fixtures. LED lamps have a lifespan and electrical efficiency which are several times greater than incandescent lamps, and are significantly more efficient than most fluorescent lamps, with some chips able to emit more than 300 lumens per watt (as claimed by Cree and some other LED manufacturers). The LED lamp market is projected to grow by more than twelve-fold over the next decade, from $2 billion in the beginning of 2014 to $25 billion in 2023, a compound annual growth rate (CAGR) of 25%. As of 2016, LEDs use only about 10% of the energy an incandescent lamp requires., A piste is a marked ski run or path down a mountain for snow skiing, snowboarding, or other mountain sports., Colorado is a state in the United States encompassing most of the Southern Rocky Mountains as well as the northeastern portion of the Colorado Plateau and the western edge of the Great Plains. Colorado is part of the Western United States, the Southwestern United States, and the Mountain States. Colorado is the 8th most extensive and the 22nd most populous of the 50 United States. The United States Census Bureau estimates that the population of Colorado was 5,456,574 on July 1, 2015, an increase of 8.50% since the 2010 United States Census., Snowboarding is a recreational activity and Olympic and Paralympic sport that involves descending a snow-covered slope while standing on a snowboard attached to a rider's feet., Snow King Mountain Resort is a ski area and summertime activity center in the western United States , located in Jackson , Wyoming . `` The King '' is Jackson 's original ski hill , founded 76 years ago in 1939 and located on the southeast edge of the city . It was the first ski area in the state of Wyoming , and locals sometimes refer to Snow King as `` The Town Hill . '' It offers three - hour passes and night skiing on its north - facing slopes . Snow King 's lift tickets are considerably less expensive than the two nearby resorts , Jackson Hole and Grand Targhee , which opened in 1965 and 1969 , respectively . Snow King offers a full - day lift ticket for $ 47 ; Jackson Hole 's full day ticket is $ 121 ., Subject: snow king mountain, Relation: instance_of, Options: (A) activity (B) base (C) border (D) capital (E) census (F) ceramic (G) city (H) country (I) day (J) diameter (K) disappearance (L) disk (M) electric current (N) electric light (O) federation (P) island (Q) july (R) lake (S) lamp (T) light fixture (U) lighting (V) mode (W) mode of transport (X) moment (Y) official (Z) part ([) path (\) people (]) piste (^) plateau (_) population (`) prairie (a) product (b) province (c) river (d) salt (e) salt lake (f) ski resort (g) skiing (h) snow (i) snowboarding (j) society (k) sport (l) spring (m) state (n) terrain (o) territory (p) three (q) treasure (r) two (s) word

Ex Output:
ski resort


Ex Input:
Context: Kenya, officially the Republic of Kenya, is a country in Africa and a founding member of the East African Community (EAC). Its capital and largest city is Nairobi. Kenya's territory lies on the equator and overlies the East African Rift covering a diverse and expansive terrain that extends roughly from Lake Victoria to Lake Turkana (formerly called Lake Rudolf) and further south-east to the Indian Ocean. It is bordered by Tanzania to the south and southwest, Uganda to the west, South Sudan to the north-west, Ethiopia to the north and Somalia to the north-east. Kenya covers , and had a population of approximately 45 million people in July 2014., The Democratic Republic of the Congo , also known as DR Congo, DRC, DROC, East Congo, Congo-Kinshasa, or simply the Congo is a country located in Central Africa. From 1971 to 1997 it was named, and is sometimes still called Zaire, and from 1908 to 1960 it was called the Belgian Congo. The DRC borders the Central African Republic, and South Sudan to the north; Uganda, Rwanda, Burundi and Tanzania to the east; Zambia and Angola to the south; the Republic of the Congo to the west and the Atlantic Ocean to the southwest. It is the second-largest country in Africa by area and eleventh largest in the world. With a population of over 80 million, the Democratic Republic of the Congo is the most populated officially Francophone country, the fourth most-populated nation in Africa and the eighteenth most populated country in the world., The Indian Ocean is the third largest of the world's oceanic divisions, covering (approximately 20% of the water on the Earth's surface). It is bounded by Asia on the north, on the west by Africa, on the east by Australia, and on the south by the Southern Ocean or, depending on definition, by Antarctica. It is named after the country of India. The Indian Ocean is known as "Ratnkara", ""the mine of gems"" in ancient Sanskrit literature, and as "Hind Mahsgar", ""the great Indian sea"", in Hindi., The Gelai Volcano stands at 2,942 metres ( 9,652 ft ) tall and is located in Tanzania in the Crater Highlands region . It is at the southeastern edge of Lake Natron in the East African Rift . Volcanic activity on Gelai dates to less than one million years ago . A number of earthquakes occurred in the area in the summer of 2007 . Associated with the largest earthquake on 17 July a NNE - oriented fracture or narrow graben formed on the southern flank of Gelai . The fracture may be associated with the intrusion of a narrow dike at a depth of around 4,000 metres ( 13,000 ft ) . The volcano falls within a game - controlled area that extends east to Longido , where hunting is permitted . This has caused a drop in the numbers of animals in the area ., The Crater Highlands (Ngorongoro Highlands) are a region along the East African Rift in Tanzania, located in a spreading zone at the intersection of branches of the African and Somali tectonic plates, resulting in distinctive and prominent landforms., India, officially the Republic of India ("Bhrat Gaarjya"), is a country in South Asia. It is the seventh-largest country by area, the second-most populous country (with over 1.2 billion people), and the most populous democracy in the world. It is bounded by the Indian Ocean on the south, the Arabian Sea on the southwest, and the Bay of Bengal on the southeast. It shares land borders with Pakistan to the west; China, Nepal, and Bhutan to the northeast; and Myanmar (Burma) and Bangladesh to the east. In the Indian Ocean, India is in the vicinity of Sri Lanka and the Maldives. India's Andaman and Nicobar Islands share a maritime border with Thailand and Indonesia. Its capital is New Delhi; other metropolises include Mumbai, Kolkata, Chennai, Bangalore, Hyderabad and Ahmedabad., Rwanda (or ), officially the Republic of Rwanda, is a sovereign state in central and east Africa and one of the smallest countries on the African mainland. Located a few degrees south of the Equator, Rwanda is bordered by Uganda, Tanzania, Burundi and the Democratic Republic of the Congo. Rwanda is in the African Great Lakes region and is highly elevated; its geography is dominated by mountains in the west and savanna to the east, with numerous lakes throughout the country. The climate is temperate to subtropical, with two rainy seasons and two dry seasons each year., Lake Natron is a salt and soda lake in the Arusha Region of northern Tanzania. The lake is close to the Kenyan border and is in the Gregory Rift, which is the eastern branch of the East African Rift. The lake is within the Lake Natron Basin, a Ramsar Site wetland of international significance., The African Great Lakes are a series of lakes constituting the part of the Rift Valley lakes in and around the East African Rift. They include Lake Victoria, the second largest fresh water lake in the world by area, and Lake Tanganyika, the world's second largest freshwater lake by volume and depth. Collectively, they contain 31,000 km (7400 cu mi) of water, which is more than either Lake Baikal or the North American Great Lakes, and constitutes about 25% of the planet's unfrozen surface fresh water., Malawi (or ; or [maláwi]), officially the Republic of Malawi, is a landlocked country in southeast Africa that was formerly known as Nyasaland. It is bordered by Zambia to the northwest, Tanzania to the northeast, and Mozambique on the east, south and west. The country is separated from Tanzania and Mozambique by Lake Malawi. Malawi is over with an estimated population of 16,777,547 (July 2013 est.). Its capital is Lilongwe, which is also Malawi's largest city; the second largest is Blantyre, the third is Mzuzu and the fourth largest is its old capital Zomba. The name Malawi comes from the Maravi, an old name of the Nyanja people that inhabit the area. The country is also nicknamed "The Warm Heart of Africa"., Geology (from the Ancient Greek , "g", i.e. "earth" and -o, "-logia", i.e. "study of, discourse") is an earth science comprising the study of solid Earth, the rocks of which it is composed, and the processes by which they change. Geology can also refer generally to the study of the solid features of any terrestrial planet (such as the geology of the Moon or Mars)., The Miocene is the first geological epoch of the Neogene Period and extends from about (Ma). The Miocene was named by Sir Charles Lyell. Its name comes from the Greek words (', less) and (', new) and means "less recent" because it has 18% fewer modern sea invertebrates than the Pliocene. The Miocene follows the Oligocene Epoch and is followed by the Pliocene Epoch., The Republic of Zambia is a landlocked country in Southern Africa, neighbouring the Democratic Republic of the Congo to the north, Tanzania to the north-east, Malawi to the east, Mozambique, Zimbabwe, Botswana and Namibia to the south, and Angola to the west. The capital city is Lusaka, in the south-central part of Zambia. The population is concentrated mainly around Lusaka in the south and the Copperbelt Province to the northwest, the core economic hubs of the country., Southern Africa is the southernmost region of the African continent, variably defined by geography or geopolitics, and including several countries.
The term "southern Africa" or "Southern Africa", generally includes Angola, Botswana, Lesotho, Malawi, Mozambique, Namibia, South Africa, Swaziland, Zambia, and Zimbabwe. From a political perspective the region is said to be unipolar with South Africa as a first regional power., Mozambique (or ), officially the Republic of Mozambique (or "") is a country in Southeast Africa bordered by the Indian Ocean to the east, Tanzania to the north, Malawi and Zambia to the northwest, Zimbabwe to the west, and Swaziland and South Africa to the southwest. It is separated from Madagascar by the Mozambique Channel to the east. The capital and largest city is Maputo (known as "Lourenço Marques" before independence)., In geology, a graben is a depressed block of land bordered by parallel faults. "Graben" is German for "ditch" or "trench". The plural form is either graben or grabens., Africa is the world's second-largest and second-most-populous continent. At about 30.3 million km² (11.7 million square miles) including adjacent islands, it covers 6% of Earth's total surface area and 20.4 % of its total land area. With 1.1 billion people as of 2013, it accounts for about 15% of the world's human population. The continent is surrounded by the Mediterranean Sea to the north, both the Suez Canal and the Red Sea along the Sinai Peninsula to the northeast, the Indian Ocean to the southeast, and the Atlantic Ocean to the west. The continent includes Madagascar and various archipelagos. It contains 54 fully recognized sovereign states (countries), nine territories and two "de facto" independent states with limited or no recognition., The East African Rift (EAR) is an active continental rift zone in East Africa. The EAR began developing around the onset of the Miocene, 2225 million years ago. In the past, it was considered to be part of a larger Great Rift Valley that extended north to Asia Minor., Burundi (or ), officially the Republic of Burundi ( or ), is a landlocked country in the African Great Lakes region of East Africa, bordered by Rwanda to the north, Tanzania to the east and south, and the Democratic Republic of the Congo to the west. It is also considered part of Central Africa. Burundi's capital is Bujumbura. The southwestern border is adjacent to Lake Tanganyika., East Africa or Eastern Africa is the easterly region of the African continent, variably defined by geography or geopolitics. In the United Nations Statistics Division scheme of geographic regions, 20 territories constitute Eastern Africa:, Tanzania , officially the United Republic of Tanzania, is a country in Eastern Africa within the African Great Lakes region. Parts of the country are in Southern Africa. It is bordered by Kenya and Uganda to the north; Rwanda, Burundi, and the Democratic Republic of the Congo to the west; Zambia, Malawi, and Mozambique to the south; and by the Indian Ocean to the east. Mount Kilimanjaro, Africa's highest mountain, is in northeastern Tanzania., Uganda (or ), officially the Republic of Uganda, is a landlocked country in East Africa. It is bordered to the east by Kenya, to the north by South Sudan, to the west by the Democratic Republic of the Congo, to the south-west by Rwanda, and to the south by Tanzania. Uganda is the world's second most populous landlocked country after Ethiopia. The southern part of the country includes a substantial portion of Lake Victoria, shared with Kenya and Tanzania. Uganda is in the African Great Lakes region. Uganda also lies within the Nile basin, and has a varied but generally a modified equatorial climate., The Great Rift Valley is a name given to the continuous geographic trench, approximately in length, that runs from Lebanon's Beqaa Valley in Asia to Mozambique in South Eastern Africa. The name continues in some usages, although it is today considered geologically imprecise as it combines features that are today regarded as separate, although related, rift and fault systems., Arusha Region is one of Tanzania's 30 administrative regions. Its capital and largest city is the city of Arusha. The region is bordered by Kajiado County and Narok County in Kenya to the north, the Kilimanjaro Region to the east, the Manyara and Singida regions to the south, and the Mara and Simiyu regions to the west. Major towns include Monduli, Namanga, Longido, and Loliondo to the north, Mto wa Mbu and Karatu to the west, and Usa River to the east. The region is comparable in size to the combined land and water areas of the United States state of Maryland., Mount Kilimanjaro, with its three volcanic cones, "Kibo", "Mawenzi", and "Shira", is a dormant volcano in Tanzania. It is the highest mountain in Africa, and rises approximately 4,900 m (16,000 ft) from its base to above sea level. The first recorded ascent to the summit of the mountain was by Hans Meyer and Ludwig Purtscheller in 1889. The mountain is part of the Kilimanjaro National Park and is a major climbing destination. The mountain has been the subject of many scientific studies because of its shrinking glaciers., Subject: gelai volcano, Relation: instance_of, Options: (A) 25 (B) area (C) bay (D) canal (E) city (F) continent (G) country (H) county (I) crater (J) discourse (K) ditch (L) geography (M) geological epoch (N) geology (O) human (P) india (Q) lake (R) landlocked country (S) literature (T) member (U) mine (V) mountain (W) name (X) nation (Y) nine (Z) ocean ([) park (\) part (]) peninsula (^) people (_) perspective (`) planet (a) population (b) region (c) republic (d) rift (e) savanna (f) science (g) sea (h) series (i) size (j) sovereign state (k) square (l) statistics (m) surface (n) term (o) terrestrial planet (p) territory (q) three (r) two (s) valley (t) volcano (u) volume (v) wetland

Ex Output:
mountain