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 world conference of life and work was an ecumenic conference.
[EX A]: world conference of life and work

[EX Q]: natassia gail zolot (born september 24, 1989 in san francisco, california), known by her stage name, kreayshawn, is an american rapper, editor and music video director.
[EX A]: kreayshawn

[EX Q]: radomir naumov (; 20 december 1946 – 22 may 2015) was a serbian politician and engineer.
[EX A]:
radomir naumov