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 raven" is a narrative poem by american writer edgar allan poe, first published in january 1845.

A: the raven
****
Q: a mathematician's apology is a book about mathematics which was written in 1940.

A: a mathematician's apology
****
Q: a shabono (also called "xapono" or "yano") is a hut used by the yanomami indios, who live in southeastern venezuela and in northern roraima, brazil.

A:
shabono
****