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]: the boeing monomail was a monoplane instead of a biplane.
[EX A]: boeing monomail

[EX Q]: a bite is a wound received from the teeth of an animal.
[EX A]: bite

[EX Q]: a fountain is an arrangement, usually made by man; in it, the water from a source is captured in some way.
[EX A]:
fountain