Complex sentence: She studied piano at the North Texas College of Music at Kidd-Key College in Sherman, Texas, under Harold von Mickwitz--the college has no connection to the University of North Texas College of Music.
Split into simpler sentences: She studied piano at the North Texas College of Music at Kidd-Key College in Sherman, Texas, under Harold von Mickwitz. The college has no connection to the University of North Texas College of Music.