Question: How many organizations own the website to which Jimmy Wales contributes?
SPARQL:
SELECT DISTINCT COUNT(?uri) WHERE { ?x <http://dbpedia.org/ontology/author> <http://dbpedia.org/resource/Jimmy_Wales> . ?x <http://dbpedia.org/ontology/owner> ?uri  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Organisation>}