Complex sentence: Founded in 1979, APT has grown rapidly in recent years and with more than 100,000 patrons attending performances each year it currently boasts the largest audience in the United States for outdoor classical theater.
Split into simpler sentences: Founded in 1979, APT has grown rapidly in recent years, with more than 100,000 patrons attending performances each year. It currently boasts the largest audience in the United States for outdoor classical theater.