Question: How many people have been the first one to scale a peak in the Yosemite Park?
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 { ?x onto:locatedInArea <http://dbpedia.org/resource/Yosemite_National_Park> . ?x onto:firstAscentPerson ?uri  . ?uri rdf:type onto:Person}