Question: When did Prince Philip, Duke of Edinburgh use the Arms of Philip Mountbatten (1947-1949) as his coat of arm?
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q80976 p:P94 ?s . ?s ps:P94 ?x filter(contains(?x,'Arms of Philip Mountbatten (1947-1949).svg')) . ?s pq:P580 ?value}