Question: Count all the ethinic group who speaks language which belongs to Anglo-Frisian language family ?
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 onto:languageFamily <http://dbpedia.org/resource/Anglo-Frisian_languages> . ?uri prop:languages ?x  . ?uri rdf:type onto:EthnicGroup}