The answer will be 'yes' if the provided sentence contains an explicit mention that answers the given question. Otherwise, the answer should be 'no'. Instances where the answer is implied from the sentence using "instinct" or "common sense" (as opposed to being written explicitly in the sentence) should be labeled as 'no'.
Example: Sentence: Jack played basketball for an hour after school, after which he was very tired. 
Question: How long did Jack play basketball?
Example solution: Yes.
Example explanation: The answer to this question (an hour)  lies in its text.

Problem: Sentence: The leaders of the Department of Homeland Security now appear before 88 committees and subcommittees of Congress. 
Question: How often are they required to appear?

Solution: No.