Complex sentence: The event is particularly notable for the record attendance of 93,173, the largest recorded attendance for a live indoor sporting event in North America until February 14,2010 when the 2010 NBA All-Star Game has an attendance of 108,713 at Cowboys Stadium.
Split into simpler sentences: The event is particularly notable for the record attendance of 93,173, the largest recorded attendance for a live indoor sporting event in North America. The record itself stood until February 14,2010 when the 2010 NBA All-Star Game broke the indoor sporting event record with an attendance of 108,713 at Cowboys Stadium.