Question: Give me all companies in Munich.
SPARQL query:
PREFIX onto: <http://dbpedia.org/ontology/>
PREFIX res: <http://dbpedia.org/resource/>
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:Company .
	{ ?uri onto:location res:Munich . } 
        UNION 
        { ?uri onto:headquarter res:Munich . } 
        UNION 
        { ?uri onto:locationCity res:Munich . }
	OPTIONAL { ?uri rdfs:label ?string. FILTER (lang(?string) = 'en') }
}