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]: In mahabharata who was father of chitrasena vrishsena?
[EX A]: Karna

[EX Q]: When did the lead singer of acdc died?
[EX A]: February 19, 1980

[EX Q]: Form of passive transport that uses transport proteins?
[EX A]:
passive-mediated transport