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.

Q: Sentence: Instead , much of numerical analysis is concerned with obtaining approximate solutions while maintaining reasonable bounds on errors .
Question: what might something obtain?

A: approximate solutions
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Q: Sentence: The State Chancellory prepared a draft , which was discussed during five sessions of the Council of Ministers , where alterations were made to further strengthen the emperor 's prerogatives at the expense of the new parliament .
Question: what was prepared?

A: a draft
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Q: Sentence: As ionospheric conditions and mobile-node locations change , these quality tuples will shift .
Question: what is changing?

A:
ionospheric conditions and mobile-node locations
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