Find GO Proteins filtered by GO id

Database: 
Statement: 

Devuelve las proteinas con GO:0005634

Query: 
SELECT ?x ?z FROM <http://khaos.uma.es/olivedb> WHERE { ?x <http://khaos.uma.es/vocab/has_annotation> ?y. ?y a <http://khaos.uma.es/vocab/GO>. ?y <http://khaos.uma.es/vocab/go_id> ?z. FILTER(REGEX(?z,"GO:0005634")) } ORDER BY ?x