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.

Example Input: Fact: studying a soil sample means studying the microorganisms in that soil
Example Output: studying a soil sample means studying the microorganisms in the?

Example Input: Fact: looking directly at an eclipse of the Sun causes harm to the eyes
Example Output: When looking at an eclipse, an important thing to remember is?

Example Input: Fact: each of the moon 's phases usually occurs once per month
Example Output:
A boy is waiting to see a full moon. He notes that the full moon is tonight, and looks at it. If he wants to see another, he must wait?