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: An example of a fossil is a paw print in rock
An example of a fossil is a paw print in what?

Fact: if an animal is trained to do something then that something is a learned behavior
Which would be considered a learned behavior?

Fact: adult amphibians live on land

Which of these live on land as adults?