What is the county seat of the county which has an Evergreen High School?
SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/Evergreen_High_School_(King_County,_Washington)> <http://dbpedia.org/ontology/county> ?x . ?x <http://dbpedia.org/ontology/countySeat> ?uri  . }
Evergreen_High_School_(King_County,_Washington)