Complex sentence: The safest of events to watch being those sanctioned by the National Tractor Pullers Association, a division of World Pulling International, Inc. or the European Tractor Pulling Committee.
Split into simpler sentences: The safest of events to watch being those sanctioned by the National Tractor Pullers Association (NTPA). NTPA is a division of World Pulling International, Inc. or the European Tractor Pulling Committee.