instruction:
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.
question:
police academy: the series, also known as police academy: the animated series, is an popular 1988 american animated television series based on the "police academy" series of films.
answer:
police academy: the animated series

question:
the family computer disk system was a disc add-on for the nintendo entertainment system that was only released in japan despite being announced in america.
answer:
family computer disk system

question:
a silent stroke is a kind of stroke that does not cause symptoms that can be seen in a major stroke such as slurred speech.
answer:
silent stroke