Complex sentence: While driving down Market Street in San Francisco, the band pulled over to the curb and Mastrokalos unloaded Bill's drum set onto the sidewalk and commanded him to get out of the van, and they drove away.
Split into simpler sentences: While driving down Market Street in San Francisco, the band pulled over to the curb and unloaded Bill's drum set onto the sidewalk. He got out of the van, and they drove away.