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: the vickers machine gun (also known as the vickers gun) was a machine gun that was used by the british army from 1912 to 1968.

A: vickers machine gun
****
Q: "the raven" is a narrative poem by american writer edgar allan poe, first published in january 1845.

A: the raven
****
Q: various positions is the seventh studio album by leonard cohen, it was released in december 1984 (and february 1985).

A:
various positions
****