Complex sentence: With the change to "Gunsmoke Western", series began starring Kid Colt, drawn by its longtime artist Jack Keller, with the lesser-known Atlas frontiersman character Billy Bucksin as a backup feature for three issues, with anthological Western stories in-between.
Split into simpler sentences: With the change to "Gunsmoke Western", the series began starring Kid Colt, drawn by its longtime artist Jack Keller. The lesser-known Atlas frontiersman character Billy Bucksin served as a backup feature for three issues, with anthological Western stories in-between.