Given a fact, create a question that can be answered using the fact. Construct the question such that it is unambiguous, has a unique answer and the answer can be given using the fact.

Fact: one day is equal to 24 hours
Saturday and Sunday together are?

Fact: a graduated cylinder is a kind of instrument for measuring volume of liquids or objects
if a person gets some fruit wine for a gift, how can they measure its volume?

Fact: being burried under soil and mud changes peat into coal through extreme heat and pressure in a swamp over a long period of time
Peat is an important factor when?