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: if two animals have the same food source then those two animals compete for food

Ex Output:
Which are in opposition for similar chow?

Ex Input:
Fact: the earth has more mass than the moon

Ex Output:
Which is the least massive?

Ex Input:
Fact: An example of a reproductive behavior is salmon returning to their birthplace to lay their eggs

Ex Output:
When fish travel in the opposite direction of flow they are going to?