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


question:
lagos state, sometimes referred to as lagos, is a state located in the southwestern part of nigeria.
answer:
lagos state


question:
causality is a way to describe how different events relate to one another.
answer:

causality