Complex sentence: Paul's popularity grew and led to appearances in clubs and at college campuses nationally, which led to further opportunities: appearing in concert with Charlie Parker, Dinah Washington, Nina Simone, Miles Davis, the Impressions, Sammy Davis, Jr., and Roberta Flack.
Split into simpler sentences: Paul's popularity grew and led to appearances in clubs and at college campuses nationally. This led to further opportunities, appearing in concert with Charlie Parker, Dinah Washington, Nina Simone, Miles Davis, the Impressions, Sammy Davis, Jr. and Roberta Flack.