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.

Ex Input:
Fact: studying a soil sample means studying the microorganisms in that soil

Ex Output:
studying a soil sample means studying the microorganisms in the?


Ex Input:
Fact: wind and rain cause erosion

Ex Output:
The face of the sphinx has changed from?


Ex Input:
Fact: the lunar surface contains many craters

Ex Output:

The biggest things on the moon are?