instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
Water contains 3 atoms.
answer:
How many atoms does water contain?


question:
You call egg-shaped galaxies, which are reddish to yellowish in color because they contain mostly old stars, elliptical galaxies.
answer:
What do you call egg-shaped galaxies, which are reddish to yellowish in color because they contain mostly old stars?


question:
A covalent network solid is a compound in which all of the atoms are connected to one another by covalent bonds.
answer:
What is a compound in which all of the atoms are connected to one another by covalent bonds?