SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/ontology/subsequentWork> <http://dbpedia.org/resource/Quagmire's_Quagmire> . ?uri <http://dbpedia.org/ontology/relative> ?x . }
Who are the relatives of the character after which Quagmire's Quagmire was made?
SELECT DISTINCT ?l WHERE { ?l property:relative ?h . . ?h property:subsequent_work resource:Quagmire's_Quagmire }
Peter Griffin
[Peter Griffin] is the character whose relative's subsequent work is Quagmire's Quagmire.
[Peter Griffin] is a character whose later work is the Quagmire.