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.

[EX Q]: Nfl teams who never made it to the superbowl?
[EX A]: Browns, Lions, Jaguars, and Texans

[EX Q]: What is the si unit of time period?
[EX A]: second

[EX Q]: First black chairman of joint chiefs of staff?
[EX A]:
Gen. Colin L. Powell