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: ernest evans (born october 3, 1941) better known as chubby checker, is a pop singer from the united states.

SOLUTION: chubby checker

PROBLEM: murray albert olmstead (september 4, 1926 – november 16, 2015) was a canadian professional ice hockey left winger.

SOLUTION: bert olmstead

PROBLEM: a headache is when your head hurts.

SOLUTION:
headache