You are given a list of queries separated by new line. Your job is to answer with the query that is the most well-formed or well-structured query in terms of grammar, punctuations, or spelling errors.

Q: Why use nautical mile unit ?
Are spirogyra unicelluar ?
What determines an atoms chemical reactivity ?
When was margaret thatcher president ?

A: When was margaret thatcher president ?
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Q: How many neutrons does the nucleus of the chromium-51 ?
What di marco polo study in china ?
What is important about mountain poptropica ?
Where do hupa people live ?

A: Where do hupa people live ?
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Q: When did elvis like music ?
What contirbuted the decline of the Rome ?
Picture of a phoenix ?
What is the real name of kaka ' ?

A:
What is the real name of kaka ' ?
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