Complex sentence: The WZT-3 Armoured Recovery Vehicle is a Polish ARV is based on the T-72M1 tank hull, armed with a 12.7mm machine-gun fitted to the commander's hatch.
Split into simpler sentences: The WZT-3 Armoured Recovery Vehicle is a Polish ARV based on the T-72M1 tank hull. It is armed with a 12.7mm machine-gun fitted to the commander's hatch.