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.

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

Example Input: saint-marcel-en-marcillat is a commune.
Example Output: saint-marcel-en-marcillat

Example Input: garfield: a tail of two kitties is an 2006 animated comedy movie that was produced by john davis, michele imperato and brian manis and was directed by tim hill.
Example Output:
garfield: a tail of two kitties