Question: Which caves have more than 3 entrances?
SPARQL query:
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX onto: <http://dbpedia.org/ontology/>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
SELECT ?uri ?string
WHERE
{ 
	?uri  rdf:type onto:Cave  .
        ?uri onto:numberOfEntrances ?entrance .
        FILTER (?entrance > 3) .
        OPTIONAL {?uri rdfs:label ?string . FILTER (lang(?string) = 'en') }
}