What is the {aircraft hijacking} for {has immediate cause} of {War on Terror}
What air ship capturing caused the War on Terror?
What aircraft hijacking caused the War on Terror?
SELECT DISTINCT ?f WHERE { resource:War_on_Terror property:has_immediate_cause ?f . ?f rdf:type ontology:aircraft_hijacking }
select distinct ?obj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q185729> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P1478> . ?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/Q898712> } 
 select distinct ?obj where { wd:Q185729 wdt:P1478 ?obj . ?obj wdt:P31 wd:Q898712 } 
September 11 attacks