TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: Compounds with metals and nonmetals sharing electrons are known as ions kinds of compounds.

SOLUTION: Compounds with metals and nonmetals sharing electrons are known as what kinds of compounds?

PROBLEM: The main advantage of urea is its very low toxicity.

SOLUTION: The main advantage of urea is its very low what?

PROBLEM: 50 s much time is required for a bicycle to travel a distance of 100 m at an average speed of 2 m/s.

SOLUTION:
How much time is required for a bicycle to travel a distance of 100 m at an average speed of 2 m/s?