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: smell is used for finding food by some animals

Ex Output:
Some animals are aided in finding food sources by?


Ex Input:
Fact: a flower is a source of nectar

Ex Output:
What is a source of nectar?


Ex Input:
Fact: nutrients are a source of energy for living things

Ex Output:

What are nutrients a source of energy for?