Question: What is the total number of companies who use a language designed by Bjarne Stroustrup?
SPARQL query:
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX prop: <http://dbpedia.org/property/>
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT COUNT(?uri) WHERE { ?x prop:designer <http://dbpedia.org/resource/Bjarne_Stroustrup> . ?uri prop:programmingLanguage ?x  . ?uri rdf:type onto:Company}