Question: Give me the count of all people who ascented a peak in California?
SPARQL:
SELECT DISTINCT COUNT(?uri) WHERE { ?x <http://dbpedia.org/ontology/locatedInArea> <http://dbpedia.org/resource/California> . ?x <http://dbpedia.org/ontology/firstAscentPerson> ?uri  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Person>}