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.

[Q]: Questions: ['when did britain go to war with germany?', 'when did britain go to war against germany?', 'when did britain go war with germany?']
[A]: 1939


[Q]: Questions: ['what century did william duke of normandy rule?']
[A]: 10xx


[Q]: Questions: ['what date did rihanna sing her first song?']
[A]:
2005