What is the {human} for {domain of saint or deity} of {Wales}
Who is the benefactor holy person of Wales?
Who is the patron saint of Wales?
SELECT DISTINCT ?u WHERE { ?u property:domain_of_saint_or_deity resource:Wales . ?u rdf:type ontology:human }
select distinct ?subj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?subj . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P2925> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q25> . ?subj <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q5> } 
 select distinct ?sbj where { ?sbj wdt:P2925 wd:Q25 . ?sbj wdt:P31 wd:Q5 } 
Saint David