instruction:
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.
question:
How many series are there of the mentalist?
answer:
7


question:
What character sings circle of life in the lion king?
answer:
Rafiki


question:
When does greys anatomy season 14 episode 18 air?
answer:

April 5, 2018