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:
luosto is a hill in finnish lapland, in the sodankylä municipality.

Ex Output:
luosto


Ex Input:
international day against homophobia is a day for campaigning against homophobia, transphobia and biphobia held every may 17.

Ex Output:
international day against homophobia


Ex Input:
felix yusupov was never punished for this murder.

Ex Output:

felix yusupov