Complex sentence: Dream Disciples was a U.K.-based band, formed in 1990 by Col Lowing (vocals), Sid Bratley (guitar and keyboard), Gordon Young (guitar and keyboards), and Karl North (ex Rosetta Stone) (bass guitar).
Split into simpler sentences: Dream Disciples was a U.K.-based band, formed in 1990 by Col Lowing (vocals), Sid Bratley (guitar and keyboard), Gordon Young (guitar and keyboards). They were later joined by Karl North (ex Rosetta Stone) (bass guitar).