SELECT DISTINCT COUNT(?uri) WHERE { ?x <http://dbpedia.org/property/firstTeam> <http://dbpedia.org/resource/Scuderia_Ferrari> . ?x <http://dbpedia.org/ontology/firstDriver> ?uri . }
How many first drivers have participated when Scuderia Ferrari was a first team?
SELECT DISTINCT COUNT ( ?r ) WHERE { ?k property:first_team resource:Scuderia_Ferrari . ?k property:first_driver ?r . }
249
There are [249] first drivers of the grand prixes whose first team is Scuderia Ferrari.
There are [249] first Grand Prix drivers whose first team is the Scuderia Ferrari.