What is the {aircraft model} for {item operated} of {Air India}
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Air India operates which aircraft model ?
SELECT DISTINCT ?x WHERE { resource:Air_India property:item_operated ?x . ?x rdf:type ontology:aircraft_model }
select distinct ?obj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q69906> . ?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> ?obj . ?obj <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q15056995> } 
 select distinct ?obj where { wd:Q69906 wdt:P121 ?obj . ?obj wdt:P31 wd:Q15056995 } 
Boeing 747-400