TASK DEFINITION: Generate a topic word for the given sentence. A topic word is usually the name of a person, place, animal, concept or object the sentence is focusing on.
PROBLEM: ammonium carbonate, also known as baker's ammonia or sal volatile, is a chemical compound.

SOLUTION: ammonium carbonate

PROBLEM: defibrillation is the act of defibrillating the heart to treat the heart when it is not pushing blood because the heart muscle is not working in any pattern.

SOLUTION: defibrillation

PROBLEM: the heat is a 2013 police comedy which stars sandra bullock and melissa mccarthy.

SOLUTION:
the heat