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]: pipo de clown (english: pipo the clown) is a clown who became very popular on dutch television.
[EX A]: pipo de clown

[EX Q]: emiliano zapata salazar (august 8, 1879 – april 10, 1919) was a leader in the mexican revolution, which started in 1910.
[EX A]: emiliano zapata

[EX Q]: a sonata is a piece of music for one instrument or one instrument with another instrument accompanying.
[EX A]:
sonata