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]: metal gear is an action-adventure stealth video game franchise made by konami.
[EX A]: metal gear

[EX Q]: nexon corporation is a korean gaming corporation and developer of online games and mmorpgs.
[EX A]: nexon

[EX Q]: corduroy is a strong fabric.
[EX A]:
corduroy