Question: Who composed the national anthem for Sanath Nandasiri's country of origin?

full_context: Document 1: Sinha Basnayake: Son of the prominent lawyer Hema Henry Basnayake, QC; he was educated at the Royal College, Colombo and graduated with a first class in law from the University of Oxford. After qualifying as a barrister he joined the UN as a Legal Officer in the International Trade Law Branch of the Office of Legal Affairs, eventually becoming its Director. Appointed as a President's Counsel by the government of Sri Lanka, he has served in many committees of the UN.
Document 2: Godwin Samararatne: Acharya Godwin Samararatne (6 September 1932 – 22 March 2000) was one of the best known lay meditation teachers in Sri Lanka in recent times. During his teaching career he was based at his Meditation Centre at Nilambe in the central hill country near Kandy. After his death in March 2000 letters and tributes poured in as many people around the world attested to the impact that Godwin and his teaching had made on their lives.
Document 3: Sare Jahan se Accha: Sare Jahan se Accha (Urdu: سارے جہاں سے اچھا ‎; Sāre Jahāṉ se Acchā), formally known as Tarānah - i - Hindi (Urdu: ترانۂ ہندی ‎; Anthem of the People of India), is an Urdu language patriotic song written for children by poet Muhammad Iqbal in the ghazal style of Urdu poetry. The poem was published in the weekly journal Ittehad on 16 August 1904. Publicly recited by Iqbal the following year at Government College, Lahore, British India (now in Pakistan) it quickly became an anthem of opposition to the British Raj. The song, an ode to Hindustan -- the land comprising present - day Bangladesh, India and Pakistan, was later published in 1924 in the Urdu book Bang - i - Dara.
Document 4: Siri Gunasinghe: Siri Gunasinghe was born Ruwanwella in Kegalle District of Sri Lanka. He was educated at Mahinda College, Galle and University of Ceylon. He subsequently travelled to Paris where he continued his studies and wrote "La technique de la peinture indienne d'après les textes du Silpa". Later Siri Gunasinghe became a university lecturer and taught at the University of Peradeniya, Sri Lanka and at the University of Victoria, British Columbia, Canada where he was a Professor in the Department of History in Art. Siri Gunasinghe had lived in Canada since 1970.
Document 5: Sare Jahan se Accha: ``Sare Jahan se Accha ''(Urdu: سارے جہاں سے اچھا ‎ ‎; Sāre Jahāṉ se Acchā), formally known as`` Tarānah - i - Hindi'' (Urdu: ترانۂ ہندی ‎ ‎; ``Anthem of the People of India ''), is an Urdu language patriotic song written for children by poet Muhammad Iqbal in the ghazal style of Urdu poetry. The poem was published in the weekly journal Ittehad on 16 August 1904. Publicly recited by Iqbal the following year at Government College, Lahore, British India (now in Pakistan) it quickly became an anthem of opposition to the British Raj. The song, an ode to Hindustan -- the land comprising present - day Bangladesh, India and Pakistan, was later published in 1924 in the Urdu book Bang - i - Dara.
Document 6: Sanath Nandasiri: Professor Sanath Nandasiri (; born February 15, 1942 in Gothatuwa, Sri Lanka) is a Sri Lankan classical musician. He is the current Chancellor of the University of the Visual and Performing Arts in Sri Lanka. President Maithripala Sirisena appointed Nandasiri after the death of Pandit Amaradewa.
Document 7: Sri Lanka Matha: There are differing accounts as to the origin of the Sri Lanka Matha. The most widely held view is that Sri Lankan composer Ananda Samarakoon wrote the music and lyrics to the song inspired / influenced by Bengali poet Rabindranath Tagore. A minority suggest that Tagore wrote the anthem in full. Some have suggested that Tagore wrote the music whilst Samarakoon wrote the lyrics. Tagore being directly involved in the creation of the song has been denied by some historians like Indian Lipi Ghosh and Sri Lankan Sandagomi Coperahewa. Samarakoon had been a pupil of Tagore at Visva - Bharati University, Santiniketan. After returning to Ceylon Samarakoon taught music at Mahinda College, Galle. The song, which was then known as Namo Namo Mata, was first sung by students at Mahinda College. After it was sung by the choir from Musaeus College, Colombo at a public event it became hugely popular in Ceylon and was widely played on radio.
Document 8: Muttukumara Kavirajar: Muttukumara Kavirajar (1780–1851), the Ceylon / Sri Lankan Tamil poet, was one of the earliest Hindus to protest via published native literature the conversion attempts by the various Protestant missionaries within the Jaffna peninsula in Sri Lanka. He wrote the Jnanakkummi or "Kummi Song on Wisdom" and Yesumataparikaram or "Abolition of the Jesus Doctrine". These poem were initially published in 1850s by Arumuga Navalar
Document 9: Vira Narendra Sinha of Kandy: Sri Vira Parakrama Narendra Sinha (1707–1739 AD) was the last Sinhalese King of Sri Lanka of the Kingdom of Kandy. Narendrasinha ascended to the throne when he was 17 years old and reigned for 32 years.
Document 10: Sammu Raghu De Silva Chandrakeerthy: Prof. Sammu Raghu De Silva Chandrakeerthy was born in 1945 and had his schooling at Richmond College, Galle. He entered the Faculty of Engineering of the University of Ceylon at Peradeniya in 1963 and graduated in 1967 with an Honours Degree in Civil Engineering. He obtained the PhD degree specializing in Structural Engineering in 1973, from the University of Sheffield, England.
Document 11: S. Mahinda: S. Mahinda arrived in Ceylon (now Sri Lanka) at a young age and was ordained as a Buddhist monk. Having learned the Sinhala language, he became a poet, creating several literary works inspiring patriotism among the Sinhalese and urging them to fight for their freedom during Sri Lankan Independence movement.. He is now considered a national hero of Sri Lanka and one among the greatest of Sinhalese poetry figures of all time.
Document 12: Vande Mataram: It played a vital role in the Indian independence movement, first sung in a political context by Rabindranath Tagore at the 1896 session of the Indian National Congress. It became a popular marching song for political activism and Indian freedom movement in 1905. Spiritual Indian nationalist and philosopher Sri Aurobindo referred it as ``National Anthem of Bengal ''. The song and the novel containing it was banned by the British government, but workers and general public defied the ban, many went to colonial prisons repeatedly for singing it, and the ban was overturned by the Indians after they gained independence from the colonial rule.
Document 13: Kularathna Maha Vidyalaya: Kulrathna Maha Vidyalaya also known as P. De S. Kularathna Vidyalaya is a mixed school in Ambalangoda, Sri Lanka. The school was established in 1986 by Dayawansha Ginige who was the founder principal of the school. The school is named after the famous Sri Lankan educationist Patrick de Silva Kularatne. Presently Kulrathna Maha Vidyalaya provides primary and secondary education to a student population of over 3000.
Document 14: Sri Lanka Matha: There are differing accounts as to the origin of the Sri Lanka Matha. The most widely held view is that Sri Lankan composer Ananda Samarakoon wrote the music and lyrics to the song inspired / influenced by Bengali poet Rabindranath Tagore. A minority suggest that Tagore wrote the anthem in full. Some have suggested that Tagore wrote the music whilst Samarakoon wrote the lyrics. Samarakoon had been a pupil of Tagore at Visva - Bharati University, Santiniketan. After returning to Ceylon Samarakoon taught music at Mahinda College, Galle. The song, which was then known as Namo Namo Mata, was first sung by students at Mahinda College. After it was sung by the choir from Musaeus College, Colombo at a public event it became hugely popular in Ceylon and was widely played on radio.
Document 15: Ajith Kumar Siriwardena: Professor Ajith Kumar Siriwardena MBChB, M.D., FRCS, Is the current professor of hepato-pancreatico-biliary surgery at the University of Manchester, and a consultant hepatobiliary surgeon at the Manchester Royal Infirmary.
ground_truth: Ananda Samarakoon
sub_queries: What country is Sanath Nandasiri from? Answer: Sri Lanka
who has written the national anthem of Sri Lanka Answer: Ananda Samarakoon