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: The economy of the early village was based on fishing and ship building . 
 Question: what was something based  on?

Ex Output:
fishing and ship building ### fishing ### ship building


Ex Input:
Sentence: A nonsurgical alternative involves the use of a miotic to constrict the pupil and prevent the lens from luxating into the anterior chamber . 
 Question: what is  constricted?

Ex Output:
the pupil


Ex Input:
Sentence: A nonsurgical alternative involves the use of a miotic to constrict the pupil and prevent the lens from luxating into the anterior chamber . 
 Question: what   luxates   somewhere?

Ex Output:

the lens