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]: giorgio chiellini (born 14 august 1984) is an italian football player.
[A]: giorgio chiellini


[Q]: the river clyde (, ]) is a river in scotland.
[A]: river clyde


[Q]: the daleks are a made-up alien race of mutants from the british science fiction television series "doctor who".
[A]:
dalek