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:
painting is using colours to make art.

Ex Output:
painting

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:
the saraiki language (perso-arabic: sometimes spelled siraiki and seraiki) is closely related to punjabi.

Ex Output:
saraiki language