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.

Input: Consider Input: 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.

Output: defibrillation


Input: Consider Input: nick halling is a british sportscaster.

Output: nick halling


Input: Consider Input: the acm a.m. turing award is an annual prize given by the association for computing machinery (acm) to "an individual selected for contributions of a technical nature made to the computing community".


Output: turing award