Question: Which telecommunications organizations are located in Belgium?
SPARQL query:
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX prop: <http://dbpedia.org/property/>
PREFIX onto: <http://dbpedia.org/ontology/>
PREFIX res: <http://dbpedia.org/resource/>
SELECT ?uri ?string
WHERE
{ 	
	?uri  rdf:type onto:Organisation  .
	?uri prop:industry ?indus .
	{ ?uri onto:location res:Belgium. } 
        UNION { ?uri prop:location res:Belgium. }
        UNION { ?uri prop:locationCountry 'Belgium'@en . }
        FILTER (regex(?indus, 'Telecommunication')) .
	OPTIONAL {?uri rdfs:label ?string . FILTER (lang(?string) = 'en') }
}