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: cerebral dema (or cerebral edema) is a build-up of extra fluid in the brain.

SOLUTION: cerebral edema

PROBLEM: norio omura ( , omura norio, born september 6, 1969) is a former japanese football player.

SOLUTION: norio omura

PROBLEM: breakdance (also called breaking, b-boying or b-girling) is a type of dance that is done by people who are part of the hip hop culture.

SOLUTION:
breakdance