Complex sentence: Amos Hawley was influenced by Roderick D. McKenzie, who was mentored by Robert E. Park and E.W. Burgess of the Chicago School of Sociology.
Split into simpler sentences: Amos Hawley was influenced by Roderick D. McKenzie. Mckenzie who was mentored by of Robert E. Park and E.W. Burgess of the Chicago School of Sociology.