Question: Give me a count of musical artists collaborating with Waylon Jennings?
SPARQL query:
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT COUNT(?uri) WHERE {?uri onto:associatedMusicalArtist <http://dbpedia.org/resource/Waylon_Jennings>  . ?uri rdf:type onto:MusicalArtist}