Complex sentence: They have covered artists as varied as Frank Zappa, The Grateful Dead, Roy Hamilton, Jerry Butler, Sam Cooke, and Elvis Presley, and toured, performed, and recorded with Joni Mitchell, Liza Minelli, The Grateful Dead, and Ray Charles.
Split into simpler sentences: They have covered artists as varied as Frank Zappa, The Grateful Dead, Roy Hamilton, Jerry Butler, Sam Cooke, and Elvis Presley. As well as toured, performed and recorded with Joni Mitchell, Liza Minelli, The Grateful Dead, and Ray Charles.