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 leningrad changed back to st petersburg?

Answer: 6 September 1991


Question: Who is the owner of royal challenges bangalore?

Answer: United Spirits Limited


Question: When is meteor garden 2018 ep 7 coming out?

Answer:
July 16, 2018