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: ['mark dean when was he born?']
[A]: 1957-03-02


[Q]: Questions: ['when was death valley found?', 'when was death valley founded?', 'when was it found national death valley park?', 'when death valley was found?', 'when was death valley founded in?', 'when was death valley national park found?']
[A]: 1933-02-11


[Q]: Questions: ['what year greece became an independent country?', 'what year did greece become a country?', 'what year was greece made a country?']
[A]:
1830