TASK DEFINITION: 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.
PROBLEM: What body of water do the tigris and euphrates rivers empty into?

SOLUTION: Shatt al-Arab

PROBLEM: Who plays in the fa cup final 2018?

SOLUTION: Chelsea and Manchester United

PROBLEM: Who originally sang counting flowers on the wall?

SOLUTION:
The Statler Brothers