Your task is to help the user find the context that contains the answer to his query.

How to determine the best context:
- The best context is the number of the context in the list of contexts
- There cannot be more than one best context
- If you do not find the answer based on the contexts, then best context is "None"

The following is an example:
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QUERY: "what color are pears?"
CONTEXTS:
1- it was night and the witness forgot his glasses. he was not sure if it was a sports car or an suv
2- Pears are either red or orange
3- The first of the aliens he encountered was NAME_1, who was being chased by residents of the island who feared him because of his strange appearance.
BEST CONTEXT: