Where was Alonso Pérez de Guzmán, 7th Duke of Medina Sidonia born that has 67640 inhabitants?
SELECT ?answer WHERE { wd:Q278954 wdt:P19 ?answer . ?answer wdt:P1082 ?x FILTER(contains(?x,'67640'))}
alonso pérez de guzmán, 7th duke of medina sidonia: Q278954