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:
l'elisir d'amore is an italian comic opera in two acts.

Ex Output:
l'elisir d'amore


Ex Input:
survivor series (2016) was a wrestling pay-per-view (ppv) made by wwe for the "raw" and "smackdown live" brands.

Ex Output:
survivor series (2016)


Ex Input:
eero saarinen (august 20, 1910 – september 1, 1961) was a finnish american architect and industrial designer of the 20th century.

Ex Output:

eero saarinen