Question: List the driver of SA MArino Grand Prix is also the Pole driver of Canadian Grand Proix ?
SPARQL:
SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/1999_San_Marino_Grand_Prix> <http://dbpedia.org/property/firstDriver> ?uri. <http://dbpedia.org/resource/1997_Canadian_Grand_Prix> <http://dbpedia.org/property/poleDriver> ?uri}