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.

Questions: ['when did mark zuckerburg invent facebook?', 'what year did mark zuckerberg invent facebook?', 'which date was facebook launched by mark zuckerberg?', 'what year did mark zukenburg start facebook?', 'in what year did mark zuckerberg found facebook?', 'what year did mark zuckerberg create facebook?']
2004

Questions: ['what is the population total in madagascar in 2009?']
20,500,000

Questions: ['when did george w bush run for president?']

2000