Complex sentence: The Lighthouse Keepers were an Australian rock band that formed in Sydney in the early 1980s though three of its members were originally from Canberra, ACT, and two of them had earlier played in another band, Guthugga Pipeline.
Split into simpler sentences: The Lighthouse Keepers were an Australian rock band that formed in Sydney in the early 1980s. Three of its members were originally from Canberra, ACT, and two of them had earlier played in another band, Guthugga Pipeline.