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: 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: where is something binding?
[EX A]: site

[EX Q]: Sentence: If neither contestant has been eliminated before time runs out in round three , the contestant with the higher score is declared the champion , adds their opponent 's score to their own , and their opponent is dropped .
Question: when would something run out?
[EX A]: in round three

[EX Q]: Sentence: The album is named after the discredited pseudoscience of phrenology , the study of head shapes to determine intelligence and character , which was used to rationalize racism during the 19th century in the United States .
Question: where was something used to do something?
[EX A]:
in the United States .