What is the {international airport} for {item operated} of {Delta Air Lines}
Who is the {universal air terminal} for {thing worked} of {Delta Discuss Lines}
Who is the {international airport} for {item operated} of {Delta Air Lines}
SELECT DISTINCT ?s WHERE { ?s property:item_operated resource:Delta_Air_Lines . ?s rdf:type ontology:international_airport }
select distinct ?subj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?subj . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P121> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q188920> . ?subj <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q644371> } 
 select distinct ?sbj where { ?sbj wdt:P121 wd:Q188920 . ?sbj wdt:P31 wd:Q644371 } 