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.

Input: Consider Input: Fact: if a liquid disappears then that liquid probably evaporated

Output: If a liquid disappears then what probably happened to it?


Input: Consider Input: Fact: the respiratory system takes in oxygen from the air

Output: The substance that the respiratory system takes in from the air is released by?


Input: Consider Input: Fact: water causes the most soil and rock erosion


Output: Which of the following is likely to cause the most erosion?