Complex sentence: The Australian Provincial Championship, often abbreviated to the APC, is a now-defunct rugby union football competition played in Australia, and one of several provincial competitions since the late 1960s, including the Wallaby Trophy and Ricoh National Championship, that have not continued.
Split into simpler sentences: The Australian Provincial Championship, or APC, is a now-defunct rugby union football competition played in Australia. It is one of several provincial competitions since the late 1960s, including the Wallaby Trophy and Ricoh National Championship, that have not continued.