Question: How many islands belong to archipelagos located in the pacific?
SPARQL query:
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX res: <http://dbpedia.org/resource/>
PREFIX prop: <http://dbpedia.org/property/>
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT COUNT(?uri) WHERE { ?x prop:location <http://dbpedia.org/resource/Pacific_Ocean> . ?uri prop:archipelago ?x . ?uri rdf:type onto:Island}