What is the {periodical literature} for {mouthpiece} of {Delta Air Lines}
What is Delta Air Line's periodical literature mouthpiece?
What periodical literature does Delta Air Lines use as a moutpiece?
SELECT DISTINCT ?q WHERE { ?q rdf:type ontology:periodical . resource:Delta_Air_Lines property:house_publication ?q }
select distinct ?obj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q188920> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P2813> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj . ?obj <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q1002697> } 
 select distinct ?obj where { wd:Q188920 wdt:P2813 ?obj . ?obj wdt:P31 wd:Q1002697 } 
Sky