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: many vehicles emit pollution into the air

Ex Output:
Pollution is?


Ex Input:
Fact: sharp beaks are a kind of adaptation for catching prey

Ex Output:
Some birds use their beaks for the same purpose as their?


Ex Input:
Fact: adding heat to an object sometimes causes chemical reactions

Ex Output:

A chemical reaction may occur when _____ is added to an object.?


