I know that the answer to the question "Who provides directions?" is in "Airborne Interception radar (AI) was unreliable. The heavy fighting in the Battle of Britain had eaten up most of Fighter Command's resources, so there was little investment in night fighting. Bombers were flown with airborne search lights out of desperation[citation needed], but to little avail. Of greater potential was the GL (Gunlaying) radar and searchlights with fighter direction from RAF fighter control rooms to begin a GCI system (Ground Control-led Interception) under Group-level control (No. 10 Group RAF, No. 11 Group RAF and No. 12 Group RAF).". Can you tell me what it is?
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Answer: RAF


I know that the answer to the question "What was transformed into a lake by a demon?" is in "The ancient history of Kathmandu is described in its traditional myths and legends. According to Swayambhu Purana, present-day Kathmandu was once a huge and deep lake names "Nagdaha" as it was full of snakes. The lake was cut drained by Bodhisatwa Manjusri with his sword and the water was evacuated out from there and he established a city called Manjupattan and made Dharmakar the ruler of the valley land. After sometimes, a demon named Banasur closed the outlet and the valley was again a lake. Then lots Krishna came to Nepal, killed Banasur and again drained out water. He has brought some Gops with him and made Bhuktaman the king of Nepal.". Can you tell me what it is?
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Answer: the valley


I know that the answer to the question "What was made in the last 2 centuries?" is in "Since the Three Kingdoms period, Nanjing has been an industrial centre for textiles and minting owing to its strategic geographical location and convenient transportation. During the Ming dynasty, Nanjing's industry was further expanded, and the city became one of the most prosperous cities in China and the world. It led in textiles, minting, printing, shipbuilding and many other industries, and was the busiest business center in East Asia. Textiles boomed particularly in Qing dynasty, the industry created around 200 thousand jobs and there were about 50 thousand satin machines in the city in 18th and 19th century.". Can you tell me what it is?
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Answer:
200 thousand jobs