Complex sentence: The boys' football program has qualified for the state playoffs on 15 occasions since 1989 advancing to the quarterfinals in 1989,2007,2010, and 2015 and the semifinals in 2007.
Split into simpler sentences: The boys' football program has qualified for the state playoffs on 15 occasions since 1989. They have advanced to the quarterfinals 4 times (1989,2007,2010, and 2015) and the semifinals once in 2007.