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.

Input: Consider Input: What body of water do the tigris and euphrates rivers empty into?

Output: Shatt al-Arab


Input: Consider Input: Who discovered the center of the milky way galaxy?

Output: a team of radio astronomers, led by Joseph Lade Pawsey


Input: Consider Input: Who does rick's voice on rick and morty?


Output: Justin Roiland