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]: anthony quinn (april 21, 1915 – june 3, 2001) was a mexican-american actor, as well as a painter and writer.
[EX A]: anthony quinn

[EX Q]: the wisconsin river is a river in the united states.
[EX A]: wisconsin river

[EX Q]: "polythene pam" is a song written by john lennon, credited to lennon/mccartney, and performed by the beatles on their album "abbey road".
[EX A]:
polythene pam