Complex sentence: Rihm spoke to the resident's of the apartment building at the listed address who remembered Fentz and described him as a man about 60 years, who had worked nearby, after his retirement, he moved to an unknown location in 1940.
Split into simpler sentences: Rihm spoke to the residents of the apartment building at the listed address who remembered Fentz and described him as a man about 60 years who had worked nearby. After his retirement, he moved to an unknown location in 1940.