Complex sentence: This was the 5th highest attendance for a regular season game in NCAA history, the second highest attendance for a regular season game at a college stadium, and the largest attendance for a regular season game in over 21 years.
Split into simpler sentences: This was the 5th highest attendance for a regular season game in NCAA history, and the second highest attendance for a regular season game at a college stadium. The largest attendance for a regular season game in over 21 years.