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

SOLUTION: bumblebee bat

PROBLEM: an adventure is something exciting that happens to someone.

SOLUTION: adventure

PROBLEM: proxima centauri is a red dwarf star that is likely a part of the alpha centauri star system and is the closest star to the sun at a distance of 4.22 ly.

SOLUTION:
proxima centauri