You are given a sentence and a question in the input. The information provided in the sentence should be enough to answer the question. You're expected to write the correct answer. Do not use any facts other than those provided in the sentence.

[EX Q]: Sentence: On the other hand , '' Happy '' is a young idealist who volunteers after his friend is killed by fanatical fellow prisoners for voicing doubts about the war 's outcome .
Question: Who was the young idealist espionage officer that later posed as a medic returning to his unit?
[EX A]: Happy.

[EX Q]: Sentence: He left the park with a sad look on his face.
Question: What did the boy do when he couldn't catch the butterfly?
[EX A]: He left the park.

[EX Q]: Sentence: She wants us to eat good food before we spoil our dinner with all the candy we are going to get.
Question: When can they go trick-or-treating?
[EX A]:
After dinner.