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: 1989 saw the release of `` Misspent Youth '' on MCA . 
 Question: what did something see?
[EX A]: the release of `` Misspent Youth '' on MCA .

[EX Q]: Sentence: According to Indian government analysis , they began the process of laying a corridor , which is now widely referred to as the Revolutionary Corridor extending from Nepal to across six Indian States , including Bihar , Chhattisgarh , Jharkhand , Andhra Pradesh , Odisha and Madhya Pradesh . 
 Question: what is something referred  to as?
[EX A]:
the Revolutionary Corridor extending from Nepal to across six Indian States , including Bihar , Chhattisgarh , Jharkhand , Andhra Pradesh , Odisha and Madhya Pradesh .