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: weathering means breaking down surface materials from larger whole into smaller pieces by weather

Ex Output:
Even items such as rocks mass can be changed due to which process?

Ex Input:
Fact: preparing for a storm requires predicting the occurrence of that storm

Ex Output:
If a snow storm is coming you should?

Ex Input:
Fact: a canyon forming occurs over a period of millions of years

Ex Output:
How long did it take the Grand Canyon to form? A?