Question: How many pole drivers have been there in grand prixes where first driver was Damon Hill?
SPARQL:
SELECT DISTINCT COUNT(?uri) WHERE { ?x <http://dbpedia.org/ontology/firstDriver> <http://dbpedia.org/resource/Damon_Hill> . ?x <http://dbpedia.org/ontology/poleDriver> ?uri  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/FormulaOneRacer>}