Complex sentence: When Bart is talking to the boy's father on the phone he says he can hear "a dingo eating his baby", referencing the case of Azaria Chamberlain, a ten-week-old baby who her parents claimed was devoured by a dingo.
Split into simpler sentences: When Bart is talking to the boy's father on the phone he says he can hear "a dingo eating his baby". This is a reference to the case of Azaria Chamberlain, a ten-week-old baby who her parents claimed was devoured by a dingo.