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.

[Q]: What character sings circle of life in the lion king?
[A]: Rafiki


[Q]: The most important mineral product of northern chile is?
[A]: copper


[Q]: Who won the fight of mayweather and pacquiao?
[A]:
Floyd Joy Mayweather Jr.