Question: What is the date of death of the editor of magazine Other Worlds, Universe Science Fiction, And Science Stories?
Sentence (from "Other Worlds, Universe Science Fiction, and Science Stories"): In 1957 Palmer changed the focus of the magazine to unidentified flying objects (UFOs), retitling it "Flying Saucers from Other Worlds", and after the September 1957 issue no more fiction appeared.
Relevant evidence: No