Complex sentence: Aside from his family, Wolf von Frankenstein's only friend is the local policeman Inspector Krogh (Lionel Atwill) who bears an artificial arm, his real arm having been "ripped out by the roots" in an encounter with the Monster as a child.
Split into simpler sentences: Aside from his family, Wolf von Frankenstein's only friend is the local policeman Inspector Krogh (Lionel Atwill) who bears an artificial arm. His arm having been "ripped out by the roots" in an encounter with the Monster as a child.