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]: rudolf kargus (born 15 august, 1952) is a former german football player.
[A]: rudolf kargus


[Q]: hiragana are part of the japanese writing system.
[A]: hiragana


[Q]: mohamed abdelwahab (1 october 1983 – 31 august 2006) is a former egyptian football player.
[A]:
mohamed abdelwahab