Given a question and its paraphrases, answer the question. The answer should exactly answer all the questions given without any ambiguity. Don't give partial answers.
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Question: Questions: ['when was thomas edisons first wife born?']

Answer: 1855-09-06


Question: Questions: ['when was louis xvi executed?']

Answer: 1793-01-21


Question: Questions: ['when did barrack obama president was it 2009 or 2008?', 'at what time barack obama become us president?']

Answer:
2009-01-20