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.

[EX Q]: Questions: ['when did barrack obama president was it 2009 or 2008?', 'at what time barack obama become us president?']
[EX A]: 2009-01-20

[EX Q]: Questions: ['when did london become the uk capital?']
[EX A]: 11xx

[EX Q]: Questions: ['when did lisa chapman have her baby?']
[EX A]:
2002-06-11