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: the canton of bellerive-sur-allier is an administrative division of the allier department in central france.

SOLUTION: canton of bellerive-sur-allier

PROBLEM: language death is when a language stops being used as a first language (also called mother language or native language) and as a second language, which it then becomes an extinct language.

SOLUTION: language death

PROBLEM: brett ratner (born march 28, 1969) is an american director and producer.

SOLUTION:
brett ratner