In this task, you are given a sentence and question which can be answered using the sentence. Your task is to answer the question using the information from the sentence. The answer to the question is unique and it is a continuous text span from the sentence.
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Question: Sentence: 1989 saw the release of `` Misspent Youth '' on MCA . 
 Question: what did something see something on?

Answer: MCA


Question: Sentence: Beyond the community , the creek continues south into Wolf Township , leaving its valley passing by the eastern edge of Hughesville . 
 Question: what is  being left?

Answer: valley


Question: Sentence: The north tower was quickly rebuilt as a stubby , flat-roofed structure . 
 Question: what was  rebuilt?

Answer:
The north tower