Question: Where was the company who is the operator of Harihar Airport founded ?
SPARQL:
SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/Harihar_Airport> <http://dbpedia.org/ontology/operator> ?x . ?x <http://dbpedia.org/property/foundation> ?uri  . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Company>}