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.

How many episodes star trek discovery season one?
15

Who sings the song you find out who your friends are?
Tracy Lawrence

What river is in wind in the willows?

River Thames