Information:  - Oboes are a family of double reed woodwind musical instruments. The most common oboe plays in the treble or soprano range. Oboes are usually made of wood, but there are also oboes made of synthetic materials. A soprano oboe measures roughly long, with metal keys, a conical bore and a flared bell. Sound is produced by blowing into the reed and vibrating a column of air. The distinctive oboe tone is versatile, and has been described as "bright". When the term "oboe" is used alone, it is generally taken to mean the standard treble instrument rather than other instruments of the family, such as the "cor anglais" (English horn) or the oboe "d'amore".  - Thiruvananthapuram ("Tiruvaantapuram"), formerly known as Trivandrum, is the capital and the largest city of the Indian state of Kerala. It is located on the west coast of India near the extreme south of the mainland. Referred to by Mahatma Gandhi as the "Evergreen city of India", it is classified as a Tier-II city by the Government of India.  - Karnataka (IPA:) is a state in south western region of India. It was formed on 1 November 1956, with the passage of the States Reorganisation Act. Originally known as the State of Mysore, it was renamed "Karnataka" in 1973. The capital and largest city is Bangalore (Bengaluru). Karnataka is bordered by the Arabian Sea and the Laccadive Sea to the west, Goa to the northwest, Maharashtra to the north, Telangana to the northeast, Andhra Pradesh to the east, Tamil Nadu to the southeast, and Kerala to the southwest. The state covers an area of , or 5.83 percent of the total geographical area of India. It is the seventh largest Indian state by area. With 61,130,704 inhabitants at the 2011 census, Karnataka is the eighth largest state by population, comprising 30 districts. Kannada, one of the classical languages of India, is the most widely spoken and official language of the state.  - The nadaswaram, nagaswaram, nadhaswaram or nathaswaram (Tamil:), is a double reed wind instrument. It is a traditional classical instrument originated in Tamil Nadu and also used in Andhra Pradesh, Karnataka, and Kerala (India).  - Bangladesh ( , "The country of Bengal"), officially the People's Republic of Bangladesh (  "Gônôprôjatôntri Bangladesh"), is a country in South Asia. It shares land borders with India and Myanmar (Burma). Nepal, Bhutan and China are located near Bangladesh but do not share a border with it. The country's maritime territory in the Bay of Bengal is roughly equal to the size of its land area. Bangladesh is the world's eighth most populous country. Dhaka is its capital and largest city, followed by Chittagong which has the country's largest port.  - Marriage, also called matrimony or wedlock, is a socially or ritually recognized union between spouses that establishes rights and obligations between them, between them and their children, and between them and their in-laws. The definition of marriage varies according to different cultures, but it is principally an institution in which interpersonal relationships, usually sexual, are acknowledged. In some cultures, marriage is recommended or considered to be compulsory before pursuing any sexual activity. When defined broadly, marriage is considered a cultural universal. Individuals may marry for several reasons, including legal, social, libidinal, emotional, financial, spiritual, and religious purposes. Whom they marry may be influenced by socially determined rules of incest, prescriptive marriage rules, parental choice and individual desire. In some areas of the world, arranged marriage, child marriage, polygamy, and sometimes forced marriage, may be practiced as a cultural tradition. Conversely, such practices may be outlawed and penalized in parts of the world out of concerns for women's rights and because of international law. In developed parts of the world, there has been a general trend towards ensuring equal rights within marriage for women and legally recognizing the marriages of interfaith or interracial, and same-sex couples. These trends coincide with the broader human rights movement.  - Kerala, historically known as Keralam, is an Indian state in South India on the Malabar coast. It was formed on 1 November 1956 following the States Reorganisation Act by combining Malayalam-speaking regions. Spread over , it is bordered by Karnataka to the north and northeast, Tamil Nadu to the east and south, and the Lakshadweep Sea to the west. With 33,387,677 inhabitants as per the 2011 Census, Kerala is the thirteenth-largest state by population and is divided into 14 districts with the capital being Thiruvananthapuram. Malayalam is the most widely spoken language and is also the official language of the state.  - An official language is a language that is given a special legal status in a particular country, state, or other jurisdiction. Typically a country's official language refers to the language used within government (e.g., courts, parliament, administration). Since "the means of expression of a people cannot be changed by any law", the term "official language" does not typically refer to the language used by a people or country, but by its government.  - The kuzhal is a traditional double reed wind instrument used in the south Indian state of Kerala . It is similar in construction to a nagaswaram or a large shehnai , and has a very shrill and penetrating tone . Kuzhal is primarily used as an accompaniment for chenda - led ensembles Panchari Melam and Pandi Melam , where the piper plays the anchor role . However , as prelude to melams , it is also used to present solo concert ( with a couple of accompanying instruments ) , in which case it is called Kuzhal Pattu . The instrument has a wooden body with a conical bore , at the end of which is affixed a brass bell . The player , who is almost always male , blows through a double reed and closes small holes with both hands .  - Tamil Nadu (English pronunciation:  ; ""; : ; literally 'The Land of Tamils' or 'Tamil Country') is one of the 29 states of India. Its capital and largest city is Chennai (formerly known as Madras). Tamil Nadu lies in the southernmost part of the Indian Peninsula and is bordered by the union territory of Puducherry and the South Indian states of Kerala, Karnataka, and Andhra Pradesh. It is bounded by the Eastern Ghats on the north, by the Nilgiri, the Anamalai Hills, and Kerala on the west, by the Bay of Bengal in the east, by the Gulf of Mannar and the Palk Strait on the southeast, and by the Indian Ocean on the south. The state shares a maritime border with the nation of Sri Lanka.  - A double reed is a type of reed used to produce sound in various wind instruments. The term "double reed" comes from the fact that there are "two" pieces of cane vibrating against each other. A single reed consists of "one" piece of cane which vibrates against a mouthpiece made of metal, hardened rubber, resin, or some other material. The term "double reeds" can also refer collectively to the class of instruments which use double reeds.  - South India is the area encompassing the Indian states of Tamil Nadu, Andhra Pradesh, Karnataka, Kerala, and Telangana as well as the union territories of Andaman and Nicobar, Lakshadweep and Puducherry, occupying 19.31% of India's area. Covering the southern part of the peninsular Deccan Plateau, South India is bounded by the Bay of Bengal in the east, the Arabian Sea in the west and the Indian Ocean in the south. The geography of the region is diverse with two mountain ranges - the Western and Eastern Ghats, bordering the plateau heartland. Godavari, Krishna, Kaveri, Tungabhadra and Vaigai rivers are important non-perennial sources of water. Bangalore, Chennai, Hyderabad, Visakhapatnam, Vijayawada, Coimbatore and Kochi are the largest urban areas.  - Lakshadweep (, Lakshadb), formerly known as the Laccadive, Minicoy, and Aminidivi Islands, is a group of islands in the Laccadive Sea, off the south western coast of India. The archipelago is a Union Territory and is governed by the Union Government of India. They were also known as Laccadive Islands, although geographically this is only the name of the central subgroup of the group. "Lakshadweep" comes from "Lakshadweepa", which means "one hundred thousand islands" in Sanskrit. The islands form the smallest Union Territory of India: their total surface area is just . The lagoon area covers about , the territorial waters area and the exclusive economic zone area . The region forms a single Indian district with ten sub divisions. Kavaratti serves as the capital of the Union Territory and the region comes under the jurisdiction of Kerala High Court. The islands are the northernmost of the Lakshadweep-Maldives-Chagos group of islands, which are the tops of a vast undersea mountain range, the Chagos-Laccadive Ridge.  - The shehnai, shenoy, sanai, shahnai, shenai, shanai or mangal vadya is a musical instrument similar to the oboe, common in India, Pakistan, and Bangladesh. It is made out of wood, with a double reed at one end and a metal or wooden flared bell at the other end. Its sound is thought to create and maintain a sense of auspiciousness and sanctity and, as a result, is widely used during marriages, processions and in temples although it is also played in concerts. The shehnai is similar to South India's nadaswaram.  - Pakistan (or ), officially the Islamic Republic of Pakistan, is a federal parliamentary republic in South Asia on crossroads of Central Asia and Western Asia. It is the sixth-most populous country with a population exceeding 200 million people. It is the 36th largest country in the world in terms of area with an area covering . Pakistan has a coastline along the Arabian Sea and the Gulf of Oman in the south and is bordered by India to the east, Afghanistan to the west, Iran to the southwest and China in the far northeast respectively. It is separated from Tajikistan by Afghanistan's narrow Wakhan Corridor in the north, and also shares a maritime border with Oman.  - Malayalam is a language spoken in India, predominantly in the state of Kerala. It is one of the 22 scheduled languages of India and was designated as a Classical Language in India in 2013. It was developed to the current form mainly by the influence of the poet Thunchaththu Ezhuthachan in the 16th century. Malayalam has official language status in the state of Kerala and in the union territories of Lakshadweep and Puducherry. It belongs to the Dravidian family of languages and is spoken by some 38 million people. Malayalam is also spoken in the neighboring states of Tamil Nadu and Karnataka; with significant speakers in the Nilgiris, Kanyakumari and Coimbatore districts of Tamil Nadu, and Dakshina Kannada of Karnataka.  - A wind instrument is a musical instrument that contains some type of resonator (usually a tube), in which a column of air is set into vibration by the player blowing into (or over) a mouthpiece set at or near the end of the resonator. The pitch of the vibration is determined by the length of the tube and by manual modifications of the effective length of the vibrating column of air. In the case of some wind instruments, sound is produced by blowing through a reed; others require buzzing into a metal mouthpiece.  - 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.    Given the information, choose the subject and object entities that have the relation of 'subclass of'.
kuzhal , musical instrument