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: the earth has more mass than the moon
Which is the least massive?

Fact: completing a circuit causes electricity to flow through that circuit
A light can be turned on if the?

Fact: each season occurs once per year

In a decade spring occurs?