Question: Who is the screenwriter for the film named after the city where Ashish Chettri was born?

full_context: Document 1: Gurbaj Singh: He is a gifted midfielder and plays in the right-half position. Gurbaj made his India debut in 2006 at the Asian Games in Doha, Qatar. He represented India at the 2010 World Cup in New Delhi, 2010 Commonwealth Games in New Delhi, the 2010 Asian Games in Guangzhou, China, and the 2012 London Olympics.
Document 2: Sikkim (film): Sikkim is a 1971 Indian documentary about the nation of Sikkim, directed by Satyajit Ray. The documentary was commissioned by the Chogyal (King) of Sikkim at a time when he felt the sovereignty of Sikkim was under threat from both China and India. Ray's documentary is about the sovereignty of Sikkim. The film was banned by the government of India, when Sikkim merged with India in 1975. In 2000, the copyright of the film was transferred to the Art and Culture Trust of Sikkim. The ban was finally lifted by the Ministry of External Affairs (MEA) in September 2010. In November 2010 the director of the Kolkata film festival stated that upon screening the documentary for the first time, he received an injunction from the court of Sikkim again banning the film.
Document 3: Sikkim: In 1975, the Prime Minister of Sikkim appealed to the Indian Parliament for Sikkim to become a state of India. In April of that year, the Indian Army took over the city of Gangtok and disarmed the Chogyal's palace guards. Thereafter, a referendum was held in which 97.5 per cent of voters supported abolishing the monarchy, effectively approving union with India. India is said to have stationed 20,000 -- 40,000 troops in a country of only 200,000 during the referendum. On 16 May 1975, Sikkim became the 22nd state of the Indian Union, and the monarchy was abolished. To enable the incorporation of the new state, the Indian Parliament amended the Indian Constitution. First, the 35th Amendment laid down a set of conditions that made Sikkim an ``Associate State '', a special designation not used by any other state. A month later, the 36th Amendment repealed the 35th Amendment, and made Sikkim a full state, adding its name to the First Schedule of the Constitution.
Document 4: Pawan Kumar Chamling: Pawan Kumar Chamling (born 22 September 1950) is the fifth and incumbent Chief minister of the Indian state of Sikkim. Chamling is the founder president of the Sikkim Democratic Front, which has governed the state for five successive terms since 1994.
Document 5: Nima Tamang: Nima Tamang (born 30 March 1993) is an Indian footballer who plays as a striker for United Sikkim F.C. in the I-League.
Document 6: Ashish Chettri: Ashish Chettri (born 22 December 1992 in Sikkim, India) is an Indian footballer who plays as a defender for United Sikkim in the I-League.
Document 7: Manish Bhargav: Manish Bhargav (born 22 February 1994 in Punjab, India) is an Indian footballer who plays as a Midfielder for Mohun Bagan in the I-League.
Document 8: Our Films, Their Films: Our Films, Their Films is an anthology of film criticism by noted Bengali filmmaker, composer and writer Satyajit Ray. Collecting articles and personal journal excerpts, it was first published in India in 1976; an English translation was published in The United States and United Kingdom in 1992. Some of articles were previously published in the bulletin of the Calcutta Film Society which Ray co-founded in 1947.
Document 9: Gangtok: Gangtok rose to prominence as a popular Buddhist pilgrimage site after the construction of the Enchey Monastery in 1840. In 1894, the ruling Sikkimese Chogyal, Thutob Namgyal, transferred the capital to Gangtok. In the early 20th century, Gangtok became a major stopover on the trade route between Lhasa in Tibet and cities such as Kolkata (then Calcutta) in British India. After India won its independence from Britain in 1947, Sikkim chose to remain an independent monarchy, with Gangtok as its capital. In 1975, after the integration with the union of India, Gangtok was made India's 22nd state capital.
Document 10: Mrinal Sen: After making five more films, he made a film with a shoestring budget provided by the Government of India. This film, Bhuvan Shome (Mr. Shome, 1969), finally launched him as a major filmmaker, both nationally and internationally. Bhuvan Shome also initiated the "New Cinema" film movement in India.
Document 11: Sukumar Ray (film): Sukumar Ray is a 1987 Bengali short documentary film made by Satyajit Ray on his father, Sukumar Ray. It was released during the birth centenary year of Sukumar Ray, who was born on 30 October 1887. The thirty minutes documentary features the life and some of the works by Sukumar Ray in the form of paintings, photographs and readings. This is the last documentary made by Satyajit Ray as a tribute to his father, before he died in 1992. The documentary used Sukumar Ray's photographs and paintings than video recording as the film was considerably a new medium in India when Sukumar Ray died in 1923.
Document 12: Baldeep Singh: Baldeep Singh (born 17 August 1982) is an Indian footballer who plays for Air India as a Defender in I-League. He is often referred to as "Baldeep Singh Senior" to avoid confusion with another former JCT player Baldeep Singh "Junior".
Document 13: Nim Dorjee Tamang: "'Kamal nayan bagchi" (born 30 October 1995) is an Indian professional footballer who plays as a centre back for Northeast United FC in the Indian Super League.
Document 14: Bimal Minj: Bimal Minj (born 4 June 1988, in Jharkhand) is an Indian footballer who plays as a defender for ONGC F.C. in the I-League.
Document 15: Sikkim: Phuntsog Namgyal was succeeded in 1670 by his son, Tensung Namgyal, who moved the capital from Yuksom to Rabdentse (near modern Pelling). In 1700, Sikkim was invaded by the Bhutanese with the help of the half-sister of the Chogyal, who had been denied the throne. The Bhutanese were driven away by the Tibetans, who restored the throne to the Chogyal ten years later. Between 1717 and 1733, the kingdom faced many raids by the Nepalese in the west and Bhutanese in the east, culminating with the destruction of the capital Rabdentse by the Nepalese. In 1791, China sent troops to support Sikkim and defend Tibet against the Gorkha Kingdom. Following the subsequent defeat of Gorkha, the Chinese Qing dynasty established control over Sikkim.
ground_truth: Satyajit Ray
sub_queries: Ashish Chettri >> place of birth Answer: Sikkim
Sikkim >> screenwriter Answer: Satyajit Ray