Question: Who has canonized someone who's a doctor of the church?
SPARQL query:
PREFIX res: <http://dbpedia.org/resource/>
PREFIX prop: <http://dbpedia.org/property/>
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT ?uri WHERE { ?x prop:titles res:Doctor_of_the_Church . ?x onto:canonizedBy ?uri  . }