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]: erzurum is a city in eastern anatolia (asian turkey).
[EX A]: erzurum

[EX Q]: in organic chemistry, an epoxide is a molecule that has a ring with at least three atoms in total, two carbon atoms and one oxygen atom.
[EX A]: epoxide

[EX Q]: curro torres (born 27 december 1976) is a spanish football player.
[EX A]:
curro torres