Complex sentence: In addition to its three core members, BlackHawk was originally accompanied by a backing band called BackHawk, which comprised Tere Bertke (bass guitar), Dale Oliver (guitar), and Bobby Huff (drums).
Split into simpler sentences: In addition to its three core members, BlackHawk was originally accompanied by a backing band of the same name. Originally, BlackHawk comprised Tere Bertke (bass guitar), Dale Oliver (guitar), and Bobby Huff (drums).