Please answer this: Extract the answer to the question from the following context. Question: What was happening to Emirate of Bukhara around 1869? Context: Russian Imperialism led to the Russian Empire's conquest of Central Asia during the late 19th century's Imperial Era. Between 1864 and 1885 Russia gradually took control of the entire territory of Russian Turkestan, the Tajikistan portion of which had been controlled by the Emirate of Bukhara and Khanate of Kokand. Russia was interested in gaining access to a supply of cotton and in the 1870s attempted to switch cultivation in the region from grain to cotton (a strategy later copied and expanded by the Soviets).[citation needed] By 1885 Tajikistan's territory was either ruled by the Russian Empire or its vassal state, the Emirate of Bukhara, nevertheless Tajiks felt little Russian influence.[citation needed]
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Answer: Russia gradually took control of the entire territory of Russian Turkestan

Please answer this: Extract the answer to the question from the following context. Question: Which non-academic alumni is an owner of an airline? Context: Non-academic alumni: Author, H. G. Wells, McLaren and Ferrari Chief Designer, Nicholas Tombazis, CEO of Rolls Royce, Ralph Robins, rock band Queen, Brian May, CEO of Singapore Airlines, Chew Choon Seng, Prime Minister of New Zealand, Julius Vogel, Prime Minister of India, Rajiv Gandhi, Deputy Prime Minister of Singapore, Teo Chee Hean, Chief Medical Officer for England, Sir Liam Donaldson, Head Physician to the Queen, Huw Thomas, CEO of Moonfruit, Wendy Tan White, Businessman and philanthropist, Winston Wong, billionaire hedge fund manager Alan Howard.
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Answer: Chew Choon Seng

Please answer this: Extract the answer to the question from the following context. Question: What was the timespan during which the Jewish population doubled? Context: By the 1st century, Babylonia, to which Jews migrated to after the Babylonian conquest as well as after the Bar Kokhba revolt in 135 CE, already held a speedily growing population of an estimated 1,000,000 Jews, which increased to an estimated 2 million between the years 200 CE 500 CE, both by natural growth and by immigration of more Jews from the Land of Israel, making up about 1/6 of the world Jewish population at that era. At times conversion has accounted for a part of Jewish population growth. Some have claimed that in the 1st century of the Christian era, for example, the population more than doubled, from four to 810 million within the confines of the Roman Empire, in good part as a result of a wave of conversion.
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Answer:
200 CE 500 CE