Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

[Q]: The brain is the most complex organ in the human body.
[A]: What is the most complex organ in the human body?


[Q]: The female reproductive system consists of structures that produce eggs, secrete female sex hormones, and ultimately enable birth of a fetus.
[A]: What system consists of structures that produce eggs, secrete female sex hormones, and ultimately enable birth of a fetus?


[Q]: Thermonuclear power is the name given to the use of controlled nuclear fusion as an energy source.
[A]:
What is the name given to the use of controlled nuclear fusion as an energy source?