instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
The name of film that polyester fibers form is mylar.
answer:
What is the name of film that polyester fibers form?


question:
Lying with their mouths open, a behavior called gaping, probably serves the function of cooling down for crocodiles.
answer:
Lying with their mouths open, a behavior called gaping, probably serves what function for crocodiles?


question:
Melted iron do scientist's believe mercury's core is mostly made of.
answer:

What do scientist's believe mercury's core is mostly made of?