Question: List the pole drivers in the grand prixes where Williams Grand Prix Engineering was a first team?
SPARQL query: SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/property/firstTeam> <http://dbpedia.org/resource/Williams_Grand_Prix_Engineering> . ?x <http://dbpedia.org/ontology/poleDriver> ?uri  . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/GrandPrix>}
Answer: The pole drivers of the Grand Prixes whose first team is Williams Grand Prix Engineering are [answer].