Give me list of people who were the first to climb a peak in the Yosemite park?
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/ontology/locatedInArea> <http://dbpedia.org/resource/Yosemite_National_Park> . ?x <http://dbpedia.org/ontology/firstAscentPerson> ?uri  . }
Yosemite_National_Park