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.

[EX Q]: plankton are drifting organisms that live in the surface layers of the ocean.
[EX A]: plankton

[EX Q]: the gates of the forest is a book written by nobel peace prize-winning author elie wiesel.
[EX A]: the gates of the forest

[EX Q]: james wan (born 27 february 1977) is an australian movie producer, screenwriter and movie director.
[EX A]:
james wan