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: 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   prevents something?
[EX A]: A nonsurgical alternative

[EX Q]: Sentence: Under an Elizabethan statute , the Erection of Cottages Act 1588 , the cottage had to be built with at least of land . 
 Question: what must something be built  with?
[EX A]: at least of land

[EX Q]: Sentence: The tank is known as the SV-001 , which not only increases the player 's offense , but considerably adds to their defense . 
 Question: where is something added  to?
[EX A]:
their defense

