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:
county monaghan (in gaelic ) is a county in ireland.

Ex Output:
county monaghan


Ex Input:
chogolisa is a 7665 m mountain in the karakoram range, in pakistan.

Ex Output:
chogolisa


Ex Input:
a movie that is released direct-to-video (also known as made-for-video, straight-to-video, more recently, straight-to-dvd) is one which has been released to the public on home video formats (historically vhs) before or without being released in movie theaters or broadcast on television.

Ex Output:

direct-to-video