Original sentence: It tells the rags-to-riches American Dream story of Italian-American "Rocky Balboa", a slightly dim-witted but good-hearted debt collector for a loan shark in Philadelphia with a talent for boxing, who gets a shot at the world heavyweight title
Edited sentence: It tells the rags-to-riches American Dream story of Italian-American "Rocky Balboa", a slightly dim-witted but good-hearted "collection agent" for a loan shark in Philadelphia with a penchant for boxing, who gets a shot at the world heavyweight title