In this task, you're given an open-domain question. Your task is to provide an answer to the given question. There is only one unique answer for each question. Your answer should be short, and refer to an entity, date, number, etc. Do not put your answer in the context of a sentence.

Example Input: Why did the united states pursue a policy of containment?
Example Output: prevent the spread of communism after the end of World War II

Example Input: Where does the water come from for victoria falls?
Example Output: Zambezi River

Example Input: Who did the house fall on in the wizard of oz?
Example Output:
The Wicked Witch of the East