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.

[EX 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: who   began  to do something?
[EX A]: Keats

[EX Q]: Sentence: The `` power cepstrum '' was defined in a 1963 paper by Bogert et al. . 
 Question: when was something defined?
[EX A]: 1963

[EX Q]: Sentence: Digging in south of Bologna for the winter , the 34th jumped off , 15 April 1945 , and captured Bologna on 21 April . 
 Question: when did someone dig?
[EX A]:
for the winter