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]: cumulative voting is a system for doing an election.
[EX A]: cumulative voting

[EX Q]: the first and only written biography of doug henning, "spellbound: the wonder-filled life of doug henning" was published in 2009 (john harrison, boxoffice books, new york.)
[EX A]: doug henning

[EX Q]: kesha wizzart (22 october 1988 – 12 july 2007) was an english singer.
[EX A]:
kesha wizzart