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: When does arrow season 6 air on tv?

SOLUTION: October 12, 2017

PROBLEM: Type of epithelial tissue containing cells that can change shapes as the tissue stretches?

SOLUTION: a type of stratified epithelium

PROBLEM: When was the last time switzerland went to war?

SOLUTION:
2003-February 2008