Question: Name the driver who was at pole in 1997 Canadian Grand Prix and also 1994 Spanish Grand Prix ?
SPARQL query:
PREFIX res: <http://dbpedia.org/resource/>
PREFIX prop: <http://dbpedia.org/property/>
PREFIX onto: <http://dbpedia.org/ontology/>
 SELECT DISTINCT ?uri WHERE { res:1997_Canadian_Grand_Prix prop:poleDriver ?uri. res:1994_Spanish_Grand_Prix onto:poleDriver ?uri}