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 Input:
Sentence: Quill pens were used to write the vast majority of medieval manuscripts , the Magna Carta and the Declaration of Independence . 
 Question: what was  used?

Ex Output:
Quill pens


Ex Input:
Sentence: Then , built by the LNWR , the branch line to Ashbourne was opened in 1899 . 
 Question: when was something opened?

Ex Output:
in 1899


Ex Input:
Sentence: He is known for his work playing the Native American flute , and has been a successful Indian dancer , and has sung in a popular blues band . 
 Question: who has  sung  in something?

Ex Output:

He