TASK DEFINITION: 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.
PROBLEM: nellie paulina burgin (july 14, 1930 – september 20, 2014), better known by her stage name polly bergen, was an american actress, singer, television host, and businesswoman.

SOLUTION: polly bergen

PROBLEM: serie d is the top level of the non-professional football clubs in italy.

SOLUTION: serie d

PROBLEM: the nbc symphony orchestra was a radio orchestra.

SOLUTION:
nbc symphony orchestra