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.

Input: Consider Input: swiss family robinson is a 1960 walt disney movie.

Output: swiss family robinson


Input: Consider Input: click beetle is the common name for beetles in the family elateridae.

Output: click beetle


Input: Consider Input: metal gear is an action-adventure stealth video game franchise made by konami.


Output: metal gear