instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
Glaciers deposit their sediment when they melt.
answer:
When do glaciers deposit their sediment?


question:
Chewing insects such as dragonflies and grasshoppers have two many sets of jaws.
answer:
Chewing insects such as dragonflies and grasshoppers have how many sets of jaws?


question:
Glutathione is a low-molecular-weight compound found in living cells that is produced naturally by the liver.
answer:
Glutathione is a low-molecular-weight compound found in living cells that is produced naturally by what?