Complex sentence: His long career mirrored changes in American entertainment tastes and technology, starting in the age of minstrel shows, moving to vaudeville, Broadway, the recording industry, Hollywood, radio, and television.
Split into simpler sentences: His long career mirrored changes in American entertainment tastes and technology. He started in the age of minstrel shows and moved to vaudeville, Broadway, the recording industry, Hollywood, radio, and television.