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.

The strain season 4 episode 10 air date?
September 17, 2017

When was the last time the us constitution changed?
May 5, 1992

Who is considered the father of western medicine?

Hippocrates of Kos