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: hexameter is a metrical line of verse.

Output: hexameter


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: the people power revolution was a historic event that happened in the philippines in 1986.


Output: people power revolution