Complex sentence: In the late 60's he formed "The Yoga Society of Pennsylvania", followed by Sumneytown, PA (1972), Summit Station, PA (1976), and the Kripalu Center for Yoga and Health in Lenox, MA (1983).
Split into simpler sentences: In the late 60's he formed "The Yoga Society of Pennsylvania". In 1970 he opened a yoga centre in Sumneytown, PA (1972), followed by Summit Station, PA (1976), and the Kripalu Center for Yoga and Health in Lenox, MA (1983).