Complex sentence: Since its founding, Perseverance Theatre has emerged as a leading American not-for-profit regional theater, collaborating with leading U.S. theater artists, and premiering more than 50 new plays by Alaskan and national playwrights.
Split into simpler sentences: Since its founding, Perseverance Theatre has emerged as a leading not-for-profit regional theater. It has collaborated with some of the leading theater artists in the United States, and has premiered more than 50 new plays by Alaskan and national playwrights.