Complex sentence: The Saints are an Australian rock band, which formed in Brisbane in 1974, founded by Chris Bailey (singer-songwriter, later guitarist), Ivor Hay (drummer), and Ed Kuepper (guitarist-songwriter).
Split into simpler sentences: The Saints are an Australian rock band, which formed in Brisbane in 1974. Founders were Chris Bailey (singer-songwriter, later guitarist), Ivor Hay (drummer), and Ed Kuepper (guitarist-songwriter).