Question: When is {end time} and {start time} of {{Guglielmo Marconi} whose {spouse} as {Beatrice O'Brien}}?
SPARQL (Wikidata): SELECT ?value1 ?value2 WHERE { wd:Q36488 p:P26 ?s . ?s ps:P26 wd:Q22230905 . ?s pq:P582 ?value1 . ?s pq:P580 ?value2 }