Question: Which countries have more than two official languages?
SPARQL:
PREFIX onto: <http://dbpedia.org/ontology/>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
SELECT DISTINCT ?uri ?string
WHERE
{ 
	?uri  rdf:type onto:Country  .
        ?uri onto:officialLanguage ?language .
	OPTIONAL {?uri rdfs:label ?string. FILTER (lang(?string) = 'en') }
} HAVING (count(?language) > 2)