TASK DEFINITION: You are given a concept, and a list of answers. You should generate a question about the concept that leads to the given answer(s).
PROBLEM: concept: Barney Friends  answers:  ['David Joyner']

SOLUTION: who played as barney?

PROBLEM: concept: Martin Luther King Jr  answers:  ['Martin Luther King, Sr.', 'Alberta Williams King']

SOLUTION: what was the name of martin luther king jr parents?

PROBLEM: concept: Brazilian Jiu Jitsu Theory And Technique  answers:  ['Martial arts']

SOLUTION:
what is brazilian jiu jitsu?