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 Input:
the diamond cutter is a wrestling finishing move done by the wrestler diamond dallas page.

Ex Output:
diamond cutter


Ex Input:
glenn branca (october 6, 1948 – may 13, 2018) was an american avant-garde composer and guitarist.

Ex Output:
glenn branca


Ex Input:
vanadium is chemical element 23 on the periodic table.

Ex Output:

vanadium