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: causality is a way to describe how different events relate to one another.

SOLUTION: causality

PROBLEM: the adelaide cup is a horserace, held in adelaide, south australia.

SOLUTION: adelaide cup

PROBLEM: ernest gary gygax (july 27, 1938 march 4, 2008) (ipa: gaj.gks) was an american writer and game designer.

SOLUTION:
gary gygax