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: This technology is implemented in the lens itself , or by moving the sensor as the final element in the optical path . 
 Question: when is something moved?
[EX A]: as the final element in the optical path

[EX Q]: Sentence: In the aftermath of September 2005 's Hurricane Katrina , Storrs was named by `` Slate '' as `` America 's Best Place to Avoid Death Due to Natural Disaster . '' 
 Question: when was something named something?
[EX A]: In the aftermath of September 2005 's Hurricane Katrina

[EX Q]: Sentence: When BrdU is integrated into DNA , it is supposed that the bromine deforms the minor groove so that Hoechst dyes can not reach their optimal binding site . 
 Question: why does something deform something?
[EX A]:
so that Hoechst dyes can not reach their optimal binding site