Complex sentence: Cave's son Jethro (born in 1991) grew up with his mother, Beau Lazenby, in Melbourne, Australia and has a career in modelling; they did not meet until he was about seven or eight.
Split into simpler sentences: Cave's son Jethro (born in 1991) grew up with his mother, Beau Lazenby, in Melbourne, Australia. Cave and Jethro did not meet until he was about seven or eight.