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