Complex sentence: Her films were mostly comedies and crime melodramas such as "Quick Millions" (1931) with Spencer Tracy and George Raft, but by the end of the decade her popularity had waned, and her subsequent film appearances were few.
Split into simpler sentences: Her films were mostly comedies and crime melodramas such as "Quick Millions" (1931) with Spencer Tracy and George Raft. By the end of the decade her popularity had waned, and her subsequent film appearances were few.