In this task, you're given an open-domain question. Your task is to provide an answer to the given question. There is only one unique answer for each question. Your answer should be short, and refer to an entity, date, number, etc. Do not put your answer in the context of a sentence.
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Question: When did the british take control of hong kong?

Answer: 26 January 1841


Question: Who did oprah winfrey play in the color purple?

Answer: Sofia


Question: Who is the greatest indian of all time?

Answer:
Bhimrao Ramji Ambedkar