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:
love's labour's lost is a comedy play by william shakespeare which was written between 1588 and 1597.

Ex Output:
love's labour's lost


Ex Input:
electoral fraud or vote rigging is any alteration or changing the vote count in election.

Ex Output:
electoral fraud


Ex Input:
the writing system of the somali language is the latin alphabet since 1960.

Ex Output:

somali language