List all the major shrines of the saints which has one of the shrines as Debre Libanos ?
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/ontology/majorShrine> <http://dbpedia.org/resource/Debre_Libanos> . ?x <http://dbpedia.org/ontology/majorShrine> ?uri  . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Saint>}
Debre_Libanos