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]: canada day is a national and an official holiday in canada celebrating its anniversary of confederation.
[EX A]: canada day

[EX Q]: vichy is a "commune" in central france, in the auvergne-rhône-alpes region, along the allier river.
[EX A]: vichy

[EX Q]: john zerzan (born in 1943) is an american anarchist and primitivist philosopher and author.
[EX A]:
john zerzan