How many different pole drivers are there, of the GPs when Renault was the first team?
SELECT DISTINCT COUNT(?uri) WHERE { ?x <http://dbpedia.org/property/firstTeam> <http://dbpedia.org/resource/Renault_in_Formula_One> . ?x <http://dbpedia.org/ontology/poleDriver> ?uri  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/FormulaOneRacer>}
Renault_in_Formula_One