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.

[EX Q]: a diode is an electronic component with two electrodes (connectors) that allows electricity to go through it in one direction and not the other direction.
[EX A]: diode

[EX Q]: affringues is a commune.
[EX A]: affringues

[EX Q]: interactive fiction, usually abbreviated as if, is a kind of computer game.
[EX A]:
interactive fiction