instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
Ice masses, acquifers, and the deep ocean are examples of water reservoirs.
answer:
Ice masses, acquifers, and the deep ocean are examples of water what?


question:
Water, air, and milk list includes only examples of matter that can take the shape of a container.
answer:
Which list includes only examples of matter that can take the shape of a container?


question:
Dna consists of two long chains of nucleotides.
answer:

Dna consists of how many long chains of nucleotides?