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

[Q]: Platelets blood component serves both structural and molecular functions in blood clotting.
[A]: What blood component serves both structural and molecular functions in blood clotting?


[Q]: Slimy smear does the bacteria look when seen with the naked eye.
[A]: How does the bacteria look when seen with the naked eye?


[Q]: Solid type of hydrocarbon is coal.
[A]:
What type of hydrocarbon is coal?