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.

[Q]: in 1920 the name was changed from fv to sv werder bremen.
[A]: werder bremen

[Q]: karl mannheim (27 march 1893 - 9 january 1947), or karoly mannheim in original writing of his name, was a hungarian-german sociologist and social scientist.
[A]: karl mannheim

[Q]: kazuo saito ( , saito kazuo, born july 27, 1951) is a former japanese football player.
[A]:
kazuo saito