Question: Who operates the bridges designed by Malaysian PWD?
SPARQL:
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/property/designer> <http://dbpedia.org/resource/Malaysian_Public_Works_Department> . ?x <http://dbpedia.org/ontology/maintainedBy> ?uri  . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Bridge>}