Definition: 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'.
Input: 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?

No.