Complex sentence: The Australian Antarctic Division (AAD) is the division of the Department of the Environment and Water Resources which manages Australia's Antarctic and sub-Antarctic stations and territories as part of the Australian Antarctic Program-historically known as the Australian National Antarctic Research Expeditions (ANARE).
Split into simpler sentences: The Australian Antarctic Division (AAD) is the division of the Department of the Environment and Water Resources. This is the Australian Government agency which manages Australia's Antarctic and sub-Antarctic stations and territories as part of the Australian Antarctic Program-historically known as the Australian National Antarctic Research Expeditions (ANARE).