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: For use in icy ground , up to 18 rubber pads can be replaced by the same number of grousers , which are stored in the vehicle 's bow when not in use .
Question: when is something stored somewhere?

A: when not in use
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Q: Sentence: A type modifier is used to make a pointer or reference .
Question: what is used to do something?

A: A type modifier
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Q: Sentence: Having finished his apprenticeship with Hammond , Keats registered as a medical student at Guy 's Hospital and began studying there in October 1815 .
Question: what did someone begin doing?

A:
studying
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