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).

Example Input: Context: Chemotherapy (often abbreviated to chemo and sometimes CTX or CTx) is a category of cancer treatment that uses one or more anti-cancer drugs (chemotherapeutic agents) as part of a standardized chemotherapy regimen. Chemotherapy may be given with a curative intent (which almost always involves combinations of drugs), or it may aim to prolong life or to reduce symptoms (palliative chemotherapy). Chemotherapy is one of the major categories of medical oncology (the medical discipline specifically devoted to pharmacotherapy for cancer)., A biopsy is a medical test commonly performed by a surgeon, interventional radiologist, or an interventional cardiologist involving extraction of sample cells or tissues for examination to determine the presence or extent of a disease. The tissue is generally examined under a microscope by a pathologist, and can also be analyzed chemically. When an entire lump or suspicious area is removed, the procedure is called an excisional biopsy. When only a sample of tissue is removed with preservation of the histological architecture of the tissues cells, the procedure is called an incisional biopsy or core biopsy. When a sample of tissue or fluid is removed with a needle in such a way that cells are removed without preserving the histological architecture of the tissue cells, the procedure is called a needle aspiration biopsy. Biopsies are most commonly performed for insight into possible cancerous and inflammatory conditions., Xeroderma pigmentosum (XP) is a rare autosomal recessive genetic disorder of DNA repair in which the ability to repair damage caused by ultraviolet (UV) light is deficient. In extreme cases, "all" exposure to sunlight must be forbidden, no matter how small; as such, individuals with the disease are often colloquially referred to as "Moon child". Multiple basal cell carcinomas (basaliomas) and other skin malignancies frequently occur at a young age in those with XP; metastatic malignant melanoma and squamous cell carcinoma are the two most common causes of death in XP victims. This disease is present in both genders and in all races, with an incidence of 1:250,000 in the United States. XP is roughly six times more common in Japanese people than in other groups., Ivan Yevhenovych Vyshnevskyi ( Ukrainian :    , Russian :    ; born 21 February 1957 in the village of Chortoryia ( today 's Myrolyubivka , Ternopil Raion ) ; died 11 May 1996 in Dnipropetrovsk of melanoma ) was a Ukrainian footballer . He earned 6 caps for the USSR national football team , making his debut on 25 January 1985 in a friendly against Yugoslavia . He was selected for the UEFA Euro 1988 squad , but did not play in any games at the tournament . He is from the region that once belonged to Winiowiecki family that had estates near Zboriv where the village of Vyshnivets is located ., Cancer is a group of diseases involving abnormal cell growth with the potential to invade or spread to other parts of the body. Not all tumors are cancerous; benign tumors do not spread to other parts of the body. Possible signs and symptoms include a lump, abnormal bleeding, prolonged cough, unexplained weight loss and a change in bowel movements. While these symptoms may indicate cancer, they may have other causes. Over 100 types of cancers affect humans.
Tobacco use is the cause of about 22% of cancer deaths. Another 10% is due to obesity, poor diet, lack of physical activity and drinking alcohol. Other factors include certain infections, exposure to ionizing radiation and environmental pollutants. In the developing world nearly 20% of cancers are due to infections such as hepatitis B, hepatitis C and human papillomavirus (HPV). These factors act, at least partly, by changing the genes of a cell. Typically many genetic changes are required before cancer develops. Approximately 510% of cancers are due to inherited genetic defects from a person's parents. Cancer can be detected by certain signs and symptoms or screening tests. It is then typically further investigated by medical imaging and confirmed by biopsy.
Many cancers can be prevented by not smoking, maintaining a healthy weight, not drinking too much alcohol, eating plenty of vegetables, fruits and whole grains, vaccination against certain infectious diseases, not eating too much processed and red meat, and avoiding too much sunlight exposure. Early detection through screening is useful for cervical and colorectal cancer. The benefits of screening in breast cancer are controversial. Cancer is often treated with some combination of radiation therapy, surgery, chemotherapy, and targeted therapy. Pain and symptom management are an important part of care. Palliative care is particularly important in people with advanced disease. The chance of survival depends on the type of cancer and extent of disease at the start of treatment. In children under 15 at diagnosis the five-year survival rate in the developed world is on average 80%. For cancer in the United States the average five-year survival rate is 66%.
In 2012 about 14.1 million new cases of cancer occurred globally (not including skin cancer other than melanoma). It caused about 8.2 million deaths or 14.6% of human deaths. The most common types of cancer in males are lung cancer, prostate cancer, colorectal cancer and stomach cancer. In females, the most common types are breast cancer, colorectal cancer, lung cancer and cervical cancer. If skin cancer other than melanoma were included in total new cancers each year it would account for around 40% of cases. In children, acute lymphoblastic leukaemia and brain tumors are most common except in Africa where non-Hodgkin lymphoma occurs more often. In 2012, about 165,000 children under 15 years of age were diagnosed with cancer. The risk of cancer increases significantly with age and many cancers occur more commonly in developed countries. Rates are increasing as more people live to an old age and as lifestyle changes occur in the developing world. The financial costs of cancer were estimated at $1.16 trillion US dollars per year as of 2010.
Definitions.
Cancers are a large family of diseases that involve abnormal cell growth with the potential to invade or spread to other parts of the body. They form a subset of neoplasms. A neoplasm or tumor is a group of cells that have undergone unregulated growth and will often form a mass or lump, but may be distributed diffusely., A lymph node or lymph gland, is an ovoid or kidney-shaped organ of the lymphatic system, and of the adaptive immune system, that is widely present throughout the body. They are linked by the lymphatic vessels as a part of the circulatory system. Lymph nodes are major sites of B and T lymphocytes, and other white blood cells. Lymph nodes are important for the proper functioning of the immune system, acting as filters for foreign particles and cancer cells. Lymph nodes do not have a detoxification function, which is primarily dealt with by the liver and kidneys., Radiation therapy or radiotherapy, often abbreviated RT, RTx, or XRT, is therapy using ionizing radiation, generally as part of cancer treatment to control or kill malignant cells and normally delivered by a linear accelerator. Radiation therapy may be curative in a number of types of cancer if they are localized to one area of the body. It may also be used as part of adjuvant therapy, to prevent tumor recurrence after surgery to remove a primary malignant tumor (for example, early stages of breast cancer). Radiation therapy is synergistic with chemotherapy, and has been used before, during, and after chemotherapy in susceptible cancers. The subspecialty of oncology concerned with radiotherapy is called radiation oncology., Melanoma, also known as malignant melanoma, is a type of cancer that develops from the pigment-containing cells known as melanocytes. Melanomas typically occur in the skin but may rarely occur in the mouth, intestines, or eye. In women they most commonly occur on the legs, while in men they are most common on the back. Sometimes they develop from a mole with concerning changes including an increase in size, irregular edges, change in color, itchiness, or skin breakdown.
The primary cause of melanoma is ultraviolet light (UV) exposure in those with low levels of skin pigment. The UV light may be from either the sun or from other sources, such as tanning devices. About 25% develop from moles. Those with many moles, a history of affected family members, and who have poor immune function are at greater risk. A number of rare genetic defects such as xeroderma pigmentosum also increase risk. Diagnosis is by biopsy of any concerning skin lesion.
Using sunscreen and avoiding UV light may prevent melanoma. Treatment is typically removal by surgery. In those with slightly larger cancers, nearby lymph nodes may be tested for spread. Most people are cured if spread has not occurred. For those in whom melanoma has spread, immunotherapy, biologic therapy, radiation therapy, or chemotherapy may improve survival. With treatment the five-year survival rates in the United States is 98% among those with localized disease and 17% among those in whom spread has occurred. The likelihood that it will come back or spread depends how thick the melanoma is, how fast the cells are dividing, and whether or not the overlying skin has broken down.
Melanoma is the most dangerous type of skin cancer. Globally, in 2012, it occurred in 232,000 people and resulted in 55,000 deaths. Australia and New Zealand have the highest rates of melanoma in the world. There are also high rates in Northern Europe and North America, while it is less common in Asia, Africa, and Latin America. Melanoma is more common in men than women. Melanoma has become more common since the 1960s in areas that are mostly Caucasian., Subject: ivan vyshnevskyi, Relation: cause_of_death, Options: (A) bleeding (B) breast cancer (C) cancer (D) carcinoma (E) disease (F) hepatitis (G) lung cancer (H) melanoma (I) old age (J) skin cancer (K) tumor
Example Output: skin cancer

Example Input: Context: Europe is a continent that comprises the westernmost part of Eurasia. Europe is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west, and the Mediterranean Sea to the south. To the east and southeast, Europe is generally considered as separated from Asia by the watershed divides of the Ural and Caucasus Mountains, the Ural River, the Caspian and Black Seas, and the waterways of the Turkish Straits. Yet the non-oceanic borders of Europea concept dating back to classical antiquityare arbitrary. The primarily physiographic term "continent" as applied to Europe also incorporates cultural and political elements whose discontinuities are not always reflected by the continent's current overland boundaries., Casino Stadion is a multi-use stadium in Bregenz , Austria . It is currently used mostly for football matches and is the home ground of SC Bregenz . The stadium holds 11,112 people ., Switzerland, officially the Swiss Confederation, is a federal republic in Europe. It consists of 26 cantons, and the city of Bern is the seat of the federal authorities. 
The country is situated in Western-Central Europe, and is bordered by Italy to the south, France to the west, Germany to the north, and Austria and Liechtenstein to the east. Switzerland is a landlocked country geographically divided between the Alps, the Swiss Plateau and the Jura, spanning an area of . While the Alps occupy the greater part of the territory, the Swiss population of approximately eight million people is concentrated mostly on the plateau, where the largest cities are to be found: among them are the two global cities and economic centres Zürich and Geneva., Lake Constance (German: Bodensee) is a lake on the Rhine at the northern foot of the Alps, and consists of three bodies of water: the "Obersee" ("upper lake"), the "Untersee" ("lower lake"), and a connecting stretch of the Rhine, called the "Seerhein"., A concert is a live music performance in front of an audience. A recital is a concert by a soloist or small group which follows a program, such as featuring the works of a single composer (organ recital). A recitalist is a musician who gives frequent recitals. The invention of the solo piano recital has been attributed to Franz Liszt., Germany, officially the Federal Republic of Germany, is a federal parliamentary republic in central-western Europe. It includes 16 constituent states, covers an area of , and has a largely temperate seasonal climate. With about 82 million inhabitants, Germany is the most populous member state of the European Union. After the United States, it is the second most popular immigration destination in the world. Germany's capital and largest metropolis is Berlin. Other major cities include Hamburg, Munich, Cologne, Frankfurt, Stuttgart and Düsseldorf., The UEFA Intertoto Cup, also abbreviated as UI Cup and originally called the International Football Cup was a summer football competition for European clubs that had not qualified for one of the two major UEFA competitions, the Champions League and the UEFA Cup. The competition was discontinued after the 2008 tournament. Teams who originally would have entered the Intertoto Cup now directly enter the qualifying stages of the UEFA Europa League from this point., A stadium (plural stadiums or stadia) is a place or venue for (mostly) outdoor sports, concerts, or other events and consists of a field or stage either partly or completely surrounded by a tiered structure designed to allow spectators to stand or sit and view the event., Vorarlberg is the westernmost federal state ("Bundesland") of Austria. Although it has the second-smallest area (Vienna is the smallest) and population (Burgenland is less populated), it has the second-highest population density (after Vienna). It borders three countries: Germany (Bavaria and Baden-Württemberg via Lake Constance), Switzerland (Graubünden and St. Gallen) and Liechtenstein. The only Austrian state that shares a border with Vorarlberg is Tyrol to the east., Bregenz is the capital of Vorarlberg, the westernmost federal state of Austria. The city is located on the eastern shores of Lake Constance, the third-largest freshwater lake in Central Europe, between Switzerland in the west and Germany in the northwest., SC Bregenz is an Austrian association football club from Austria, based in the town of Bregenz, which was founded in 1919. They play their home games at the Casino Stadium. They currently participate in the Austrian Regional League. They participated in the UEFA Intertoto Cup in 2002 and 2004, exiting in the Second and First rounds respectively., Subject: casino stadium, Relation: located_in_the_administrative_territorial_entity, Options: (A) atlantic ocean (B) austria (C) berlin (D) bern (E) bodensee (F) burgenland (G) central (H) düsseldorf (I) east (J) europe (K) european union (L) france (M) frankfurt (N) germany (O) italy (P) jura (Q) of (R) rhine (S) stadium (T) switzerland (U) tyrol (V) union (W) vorarlberg (X) west
Example Output: vorarlberg

Example Input: Context: Najafabad (also Romanized as Najafbd) is a city in and the capital of Najafabad County, Isfahan Province, Iran. At the 2006 census, its population was 206,114, in 54,529 families. It is located west of Isfahan and is increasingly becoming a part of Isfahan Metropolitan area., Iran (, also , ; ' ), also known as Persia, officially the Islamic Republic of Iran (' ), is a sovereign state in Western Asia. It is bordered to the northwest by Armenia, the "de facto" Nagorno-Karabakh Republic, and Azerbaijan; to the north by the Caspian Sea; to the northeast by Turkmenistan; to the east by Afghanistan and Pakistan; to the south by the Persian Gulf and the Gulf of Oman; and to the west by Turkey and Iraq. Comprising a land area of , it is the second-largest country in the Middle East and the 18th-largest in the world. With 82.8 million inhabitants, Iran is the world's 17th-most-populous country. It is the only country with both a Caspian Sea and an Indian Ocean coastline. The country's central location in Eurasia and Western Asia, and its proximity to the Strait of Hormuz, make it of great geostrategic importance. Tehran is the country's capital and largest city, as well as its leading economic center., Geography.
The Isfahan province covers an area of approximately 107,027 square km and is situated in the center of Iran. To its north, stand the Markazi (Central) Province and the provinces of Qom and Semnan. To its south, it is bordered by the provinces of Fars, and Kohgiluyeh and Boyer-Ahmad Province. Aminabad is the most southern city of Isfahan province just 2 km north of the border. To the east, it is bordered by the province of Yazd. To the west, it is bordered by the province of Lurestan and to the southwest by the province of Chahar Mahal and Bakhtiyari., Isfahan (: pronounced ), historically also rendered in English as Ispahan, Sepahan, Esfahan or Hispahan, is the capital of Isfahan Province in Iran, located about south of Tehran. At the 2011 census, it had a population of 1,756,126 and its built-up ("or metro") area was home to 2,391,738 inhabitants including Khomeynishahr, Shahinshahr, Khvorasgan, Dorcheh Piaz, Falavarjan, Kelishad Va Sudarjan, Abrisham, Kushk and Kharizsang cities. The Greater Isfahan Region had a population of 3,793,104 in the 2011 Census, the second most populous metropolitan area in Iran after Tehran. The counties of Isfahan, Borkhar, Najafabad, Khomeynishahr, Shahinshahr, Mobarakeh, Falavarjan, Tiran o Karvan, Lenjan and Jay all constitute the metropolitan city of Isfahan., Ibn Rustah ( in Persian :     - Amad ebn Roste Efahn , also spelled Ibn Rusta , Ibn Ruste ) was a 10th - century Persian explorer and geographer born in Rosta district , Isfahan , Persia . He wrote a geographical compendium known as Book of Precious Records . The information on his home town of Isfahan is especially extensive and valuable . Ibn Rustah states that , while for other lands he had to depend on second - hand reports , often acquired with great difficulty and with no means of checking their veracity , for Isfahan he could use his own experience and observations or statements from others known to be reliable . Thus we have a description of the twenty districts ( rostaqs ) of Isfahan containing details not found in other geographers ' works . Concerning the town itself , we learn that it was perfectly circular in shape , with a circumference of half a farsang , walls defended by a hundred towers , and four gates . His information on the non-Islamic peoples of Europe and Inner Asia makes him a useful source for these obscure regions ( he was even aware of the existence of the British Isles and of the Heptarchy of Anglo - Saxon England ) and for the prehistory of the Turks and other steppe peoples . He travelled to Novgorod with the Rus ' , and compiled books relating his own travels , as well as second - hand knowledge of the Khazars , Magyars , Slavs , Bulgars , and other peoples . He wrote of tenth - century city of the Rus ' : `` As for the Rus , they live on an island ... that takes three days to walk round and is covered with thick undergrowth and forests ; ... They harry the Slavs , using ships to reach them ; they carry them off as slaves and ... sell them . They have no fields but simply live on what they get from the Slav 's lands ... When a son is born , the father will go up to the newborn baby , sword in hand ; throwing it down , he says , ' I shall not leave you with any property : You have only what you can provide with this weapon . ' '' His impression of the Rus ' seems to be very favourable : `` They carry clean clothes and the men adorn themselves with bracelets and gold . They treat their slaves well and also they carry exquisite clothes , because they put great effort in trade . They have many towns . They have a most friendly attitude towards foreigners and strangers who seek refuge . '' This is in contrast to the account of Ibn Fadlan and other Arab authors whose views on hygiene ( based on Islamic teachings on cleanliness and Islamic medical knowledge ) contrasted with that of the Rus ' . However , the word clean initially appeared in the first Russian translation of Ibn Rustah by professor Daniel Chwolson ( who also misspelled his name as Ibn Dasta ( h ) ) . Consecutive Russian editions of Chwolson 's translation include a footnote saying that the Arabic original clearly says the opposite , unclean or impure , and suggesting that Chwolson made such a correction intentionally , out of a remote concern that modern Russians might be offended by such characteristic . Of ancient Croatia he wrote in the chronicle Al - Djarmi : `` Their ruler is crowned ... He dwells in the midst of the Slavs ... He bears the title of ' ruler of rulers ' and is called ' sacred king ' . He is more powerful than the Zupan ( viceroy ) , who is his deputy ... His capital is called Drzvab where is held a fair of three days every month . '' About a certain king of the Caucasus Ibn Rustah wrote : `` He prayed on Fridays with the Muslims , on Saturdays with the Jews , and on Sundays with the Christians . ' Since each religion claims that it is the only true one and that the others are invalid ' , the king explained , ' I have decided to hedge my bets . ' '' He also traveled extensively in Arabia and is one of the early Persian explorers to describe the city of Sana'a . In his Book of Precious Records , he writes : `` It is the city of Yemen -- there not being found in the highland or the Tihama or the Hijaz a city greater , more populous or more prosperous , of more noble origin or more delicious food than it . ... San'a is a populous city with fine dwellings , some above others , but most of them are decorated with plaster , burned bricks , and dressed stones . '', Tehran ( "Tehrn") is the capital of Iran and Tehran Province. With a population of around 9 million in the city and 16 million in the wider metropolitan area, Tehran is the most populous city of Iran, the 2nd-most populous city in Western Asia and the 3rd-largest metropolitan area in the Middle East. It is ranked 29th in the world by the population of its metropolitan area., Mobarakeh (also Romanized as Mobrakeh and Mubrakeh) is a city in and the capital of Mobarakeh County, Isfahan Province, Iran. At the 2006 census, its population was 62,454, in 16,583 families. Mobarakeh Steel Company (MSC, Persian:  , Foolad Mobarakeh) is an Iranian steel company, located 65 km south west of Esfahan, near the city of Mobarakeh. It is Iran's largest steel maker, and one of the largest industrial complexes operating in Iran. It was first commissioned after the Iranian Revolution in 1979 and officially initiated operations during 1993. Underwent major revamping during year 2000, and was scheduled for a second and third revamping in 20092010, bringing the total steel output to 7,200,000 metric tons per year. The company owns the successful football club, F.C. Sepahan., Falavarjan (also Romanized as Falvarjn, Falvar Jn, and Felvarjn; also known as Pol-e Vargn, Pol-e Varqn, Pul-i-Vargn, and Mollvarjn) is a city in and the capital of Falavarjan County, Isfahan Province, Iran. At the 2006 census, its population was 37,740, in 9,097 families., Rosta or Rustah (in Persian: ) was the name of a district in Isfahan area in Iran attested in historical sources. The Persian explorer Ibn Rustah was a native of Rosta., Subject: ahmad ibn rustah, Relation: given_name, Options: (A) ahmad (B) an (C) asia (D) home (E) iran (F) just (G) per
Example Output:
ahmad