TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: Chewing insects such as dragonflies and grasshoppers have two many sets of jaws.

SOLUTION: Chewing insects such as dragonflies and grasshoppers have how many sets of jaws?

PROBLEM: Springs or geysers do we call heated groundwater that erupts from the ground under pressure.

SOLUTION: What do we call heated groundwater that erupts from the ground under pressure?

PROBLEM: When we move down a group of elements on the periodic table, their electronegativity it decreases.

SOLUTION:
When we move down a group of elements on the periodic table, what happens to their electronegativity?