Original sentence: Shriekback are a rock band formed in 1981 in Kentish Town by Barry Andrews, formerly of XTC and League of Gentlemen (keyboards/synthesizers/vocals) and Dave Allen, formerly of the Gang of Four (bass), with Carl Marsh, formerly of Out On Blue Six (guitars/vocals) soon added to the line-up
Edited sentence: Shriekback are a rock band formed in 1981 in Kentish Town by Barry Andrews, formerly of XTC and League of Gentlemen (keyboards/synthesizers/vocals), and Dave Allen, formerly of the Gang of Four (bass), with Carl Marsh, formerly of Out On Blue Six (guitars/vocals) soon added to the line-up