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.

Who won i'm a celebrity australia 2016?
Brendan Fevola

What's the zip code for o'fallon missouri?
63366, 63368

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

Shatt al-Arab