instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
Some compounds form rigid frameworks called crystals.
answer:
Some compounds form rigid frameworks called what?

question:
Single-celled eukaryotes that share some traits with animals are also called?
answer:
Single-celled eukaryotes that share some traits with animals are also called?

question:
Its electon configuration makes nobel gases unreactive.
answer:
What makes nobel gases unreactive?