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

[EX Q]: Protons and neutrons are made of quarks, which are fundamental particles of matter.
[EX A]: A fundamental particle of matter, protons and neutrons are made of these?

[EX Q]: You call the hard case that surrounds the soft parts of some animals the exoskeleton.
[EX A]: What do you call the hard case that surrounds the soft parts of some animals?

[EX Q]: Lamprey cartilage contains no collagen.
[EX A]:
What type of cartilage contains no collagen?