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.

Q: rakesh sharma (born 13 january 1949) is a retired squadron leader in the indian air force.

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

A: bumblebee bat
****
Q: zhang xianliang (; december 1936 – 27 september 2014) was a chinese author and poet.

A:
zhang xianliang
****