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

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

[EX Q]: Endoscopes are used to explore the body through various orifices or minor incisions.
[EX A]: Endoscopes are used to explore the body through various orifices or these?

[EX Q]: A domain is the highest taxon in the classification of living things.
[EX A]:
What is the highest taxon in the classification of living things?