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

[EX Q]: Three many families are known quarks divided into.
[EX A]: How many families are known quarks divided into?

[EX Q]: You call materials that have high resistance to electric current electric insulators.
[EX A]: What do you call materials that have high resistance to electric current?

[EX Q]: Someone flat-earther believes something despite the evidence is referred to by what term that references a false belief about our planet.
[EX A]:
Someone who believes something despite the evidence is referred to by what term that references a false belief about our planet?