You are given a concept, and a list of answers. You should generate a question about the concept that leads to the given answer(s).

Q: concept: Richard Nixon  answers:  ['1960']

A: when richard nixon was president?
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Q: concept: California  answers:  ['Colusa County', 'San Bernardino County', 'Contra Costa County', 'El Dorado County', 'Alameda County', 'Calaveras County', 'Del Norte County', 'Alpine County', 'Amador County', 'Rancho Cucamonga']

A: what cities should i visit in california?
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Q: concept: Potomac River  answers:  ['Chesapeake Bay']

A:
where does the potomac river flow into?
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