Complex sentence: Hollandersky stayed in touch with Cluverius after his retirement from the Navy and visited him in Worcester, Massachusetts in September 1947 while he was working as President of Worcester Polytechnic Institute.
Split into simpler sentences: Hollandersky stayed in touch with Cluverius after his retirement from the Navy. In September 1947, Abe visited Cluverius in Worcester, Massachusetts while he was working as President of Worcester Polytechnic Institute.