Question: When did Rolf Ingvar Semmingsen's wife die?
Sentence (from "Rolf Ingvar Semmingsen"): He worked as director of the cooperative Coop NKL ("Norges Kooperative Landsforening") from 1949 to 1960, but returned to the Price Directorate to serve as director from 1961 to 1977.
Relevant evidence: No