Question: What is the base currency of the country which operates the Marion Dufresne?
SPARQL query:
PREFIX res: <http://dbpedia.org/resource/>
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/Marion_Dufresne_(1995)> onto:operator ?x . ?x onto:currency ?uri . }