(Q42213179)

?person wdt:P26 ?relative . FILTER NOT EXISTS { ?person wdt:P570 [] } FILTER NOT EXISTS { ?relative wdt:P570 [] } FILTER NOT EXISTS { ?person p:P26 ?st1 . ?st1 pq:P582 [] . ?st1 ps:P26 ?relative } FILTER NOT EXISTS { ?relative p:P26 ?st2 . ?st2 pq:P582 [] . ?st2 ps:P26 ?person }