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: mpika district is a district of zambia in the northern province.

A: mpika district
****
Q: shaun of the dead is a 2004 british-french zombie-themed romantic comedy movie.

A: shaun of the dead
****
Q: the descent of man, and selection in relation to sex is a book by charles darwin, first published in 1871.

A:
the descent of man
****