Complex sentence: "Heavy Action" is a piece of music composed by Johnny Pearson best known in the UK as the theme for Superstars, and in North America as the theme music for ABC and ESPN's "Monday Night Football".
Split into simpler sentences: Heavy Action is a piece of music composed by Johnny Pearson. It is best known in the UK as the theme for Superstars, and in North America as the theme music for ABC and ESPN's "Monday Night Football".