Complex sentence: John Farnham had been a teen pop idol during the 1960s and 1970s, he met Glenn Wheatley, who was bass guitarist of rock group The Masters Apprentices, when both acts were managed by Darryl Sambell.
Split into simpler sentences: John Farnham had been a teen pop idol during the 1960s and 1970s. He met Glenn Wheatley, who was bass guitarist of rock group The Masters Apprentices, when both acts were managed by Darryl Sambell.