Question: Who wrote the screenplay for the film named after the state where the Nathula Pass can be found?

full_context: Document 1: Khyber Pass: The Khyber Pass (Pashto: د خیبر درہ ‎, Urdu: درۂ خیبر ‬ ‎) (elevation: 1,070 m or 3,510 ft) is a mountain pass in the north of Pakistan, close to the border with Afghanistan. It connects the town of Landi Kotal to the Valley of Peshawar at Jamrud by traversing part of the Spin Ghar mountains. An integral part of the ancient Silk Road, it has long had substantial cultural, economic, and geopolitical significance for Eurasian trade. Throughout history it has been an important trade route between Central Asia and the Indian subcontinent and a strategic military location. The summit of the pass is 5 km (3.1 mi) inside Pakistan at Landi Kotal. The Khyber Pass is part of the Asian Highway 1 (AH1).
Document 2: Mount Everest: Mount Everest, known in Nepali as Sagarmatha (सगरमाथा) and in Tibetan as Chomolungma (ཇོ ་ མོ ་ གླང ་ མ), is Earth's highest mountain above sea level, located in the Mahalangur Himal sub-range of the Himalayas. The international border between Nepal (Province No. 1) and China (Tibet Autonomous Region) runs across its summit point.
Document 3: 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 4: 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 5: Sengge-La: The Sengge-La is a mountain of around 4700 metres in the Zanskar region in the state of Ladakh in Jammu and Kashmir in northern India.
Document 6: Daulat Beg Oldi: Daulat Beg Oldi (also Oldie, DBO), Ladakh, state of Jammu and Kashmir, India is a historic camp site and current military base located on an ancient trade route connecting Ladakh to the Tarim Basin. The Chip Chap River flows just to the south of Daulat Beg Oldi from east to west. Daulat Beg Oldie also has an airstrip at an altitude of 5065 meters (16,614 feet), which is the world's highest airstrip.
Document 7: Rohtang Pass: Rohtang Pass () (Bhoti: རོ་ཐང་། Rohtang , lit: རོ་ (Ro)- corpse, ཐང་། (thang)- plain/field due to people working in CBRE dying in bad weather trying to cross the pass) (elevation ), is a high mountain pass on the eastern Pir Panjal Range of the Himalayas around from Manali. It connects the Kullu Valley with the Lahaul and Spiti Valleys of Himachal Pradesh, India.
Document 8: Nathu La: Nathu La (Devanagari नाथू ला; Tibetan: རྣ ་ ཐོས ་ ལ ་, IAST: Nāthū Lā, Chinese: 乃堆拉山口; pinyin: Nǎiduīlā Shānkǒu) is a mountain pass in the Himalayas. It connects the Indian state of Sikkim with China's Tibet Autonomous Region. The pass, at 4,310 m (14,140 ft) above mean sea level, forms a part of an offshoot of the ancient Silk Road. Nathu means ``listening ears ''and La means`` pass'' in Tibetan. On the Indian side, the pass is 54 km (34 mi) east of Gangtok, the capital of Sikkim. Only citizens of India can visit the pass, and then only after obtaining a permit in Gangtok.
Document 9: Tibet: The Indus and Brahmaputra rivers originate from a lake (Tib: Tso Mapham) in Western Tibet, near Mount Kailash. The mountain is a holy pilgrimage site for both Hindus and Tibetans. The Hindus consider the mountain to be the abode of Lord Shiva. The Tibetan name for Mt. Kailash is Khang Rinpoche. Tibet has numerous high-altitude lakes referred to in Tibetan as tso or co. These include Qinghai Lake, Lake Manasarovar, Namtso, Pangong Tso, Yamdrok Lake, Siling Co, Lhamo La-tso, Lumajangdong Co, Lake Puma Yumco, Lake Paiku, Lake Rakshastal, Dagze Co and Dong Co. The Qinghai Lake (Koko Nor) is the largest lake in the People's Republic of China.
Document 10: Mussoorie: Happy Valley has a small Tibetan temple. This was the first Tibetan temple built in India. The temple was constructed in 1960 by the Tibetan refugees. Lal Tibba is another tourist spot of Mussoorie. Located upwards of main Mussoorie in the cantonment area of Landour, the most appropriate way to explore is to drive up to Char Dukaan and the take the short hike to Lal Tibba. Essentially a gazing spot that offers majestic views of the Himalayas.
Document 11: 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 12: 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 13: 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 14: 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.
Document 15: 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.
ground_truth: Satyajit Ray
sub_queries: nathula pass is located in which state of india Answer: Sikkim
Sikkim >> screenwriter Answer: Satyajit Ray