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: ille-et-vilaine is a department found in the west of france in the brittany region.
Example Output: ille-et-vilaine

Example Input: jesse helms (october 18, 1921 - july 4, 2008) was a senator from north carolina.
Example Output: jesse helms

Example Input: a mixtape (or mixed-tape) is any compilation of songs recorded onto a cassette tape or other storage medium.
Example Output:
mixtape