Wiki articles creator nick and organization details PREFIX sioc: <http://rdfs.org/sioc/ns#> PREFIX sioct: <http://rdfs.org/sioc/types#> PREFIX foaf: <http://xmlns.com/foaf/0.1/> CONSTRUCT { ?post foaf:maker ?maker . ?maker foaf:nick ?nick . ?maker foaf:organization ?org . } WHERE { ?forum a sioct:Wiki . ?forum sioc:container_of ?post. optional { ?post foaf:maker ?maker }. optional { ?maker foaf:nick ?nick } . optional { ?maker foaf:organization ?org } . }