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: the bumblebee bat ("craseonycteris thonglongyai"), also known as kitti's hog-nosed bat, is an endangered species of bat.

Output: bumblebee bat


Input: Consider Input: isaac watts (17 july 1674 – 25 november 1748) was an english pastor, preacher, poet, and hymn writer.

Output: isaac watts


Input: Consider Input: illinois is a state in the united states.


Output: illinois