For text match problem, what is the different between question-question match and question-answer match?

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For text match problem, what is the different between question-question match and question-answer match? #17

Closed guotong1988 closed 5 years ago

guotong1988 commented 5 years ago

I know question-question match is a text similarity problem. What about question-answer match or question-doc match? It is used in information retrieval. question-question match is indeed text similarity. But how do you define question-answer similarity? Thank you!!