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: When did nigeria become a federation of 19 states?
Example Output: 1976

Example Input: Where is the descending aorta located in the mediastinum?
Example Output: posterior mediastinal cavity

Example Input: When was the ibm xt microcomputer released in the market?
Example Output:
March 8, 1983