Complex sentence: His work in these years were influenced by conversations with Robert K. Greenleaf, Amerson explored the place of Servant Leadership in urban parish life and studied Greenleaf's writings on the role of theological seminaries.
Split into simpler sentences: His work in these years was influenced by conversations with Robert K. Greenleaf. Amerson studied the role of Servant Leadership in urban parish life and interpreted Greenleaf's writings on the role of theological seminaries.