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: With large population movements in the 1990s to urban areas, the provision of education has undergone transformation as well. 
Question: How long of a time do we refer to when we say ""the 1990s""?

Yes.