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.

Sentence: Albert looked at the tree house he had built and was very happy.
Question: What did Albert choose to build?
a tree house.

Sentence: Sarah was too scared to go to school with all of the thunder and lighting.
Question: What scared Sarah?
The thunder and lighting.

Sentence: He was free!.
Question: Why did Harry want to leave his house?
He was free.