Question: When was Polly Samson the spouse of David Gilmour?
Paraphrase: During what years were Polly Samson and David Gilmour married?
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q178517 p:P26 ?s . ?s ps:P26 wd:Q281036 . ?s pq:P580 ?value}