Question: What daughter of William Cavendish-Bentinck, 3rd Duke of Portland was married to William Bentinck, 2nd Duke of Portland?
Paraphrase: What daughter of William Cavendish-Bentinck, third Duke of Portland was married to William Bentinck, 2nd Duke of Portland?
SPARQL (Wikidata): SELECT ?answer WHERE { wd:Q157208 wdt:P25 ?answer . ?answer wdt:P26 wd:Q125872}
Answer: Margaret Bentinck, Duchess of Portland