instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
Poles parts of the planet does solar energy have difficulty reaching.
answer:
What parts of the planet does solar energy have difficulty reaching?

question:
Water can be boiled to kill giardia and most other pathogens.
answer:
Water can be boiled to kill giardia and most other what?

question:
Ribosomes are the only organelles that prokaryotic cells have.
answer:
What are the only organelles that prokaryotic cells have?