TASK DEFINITION: In this task, you are given a question and a corresponding answer. Your task is to generate a fact statement that is useful in answering the given question.
PROBLEM: Question: An example of biofuel could be? Answer: leaves.

SOLUTION: biofuel is used to produce electricity by burning

PROBLEM: Question: Which is a complete circuit? Answer: a refrigerator that is running.

SOLUTION: a complete electrical circuit is a source of electrical energy

PROBLEM: Question: Which would freeze last? Answer: an ocean of water.

SOLUTION:
adding salt to a solid decreases the freezing point of that solid