improvised explosive devices is a type of what aviation incident?
Entity Entity Entity Entity Entity
m.02d1gn m.02q02vq m.04dlqv m.0dklmx m.0h78yk
Gulf Air Flight 771 TWA Flight 841 of 1974 Argo 16 Pan Am Flight 103 Pan Am Flight 830
class entity
aviation.airliner_accident m.01n8xw
aviation.airliner_accident aviation.accident_type
Aviation incident improvised explosive devices
none none
aviation.airliner_accident.accident_type
Type
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> PREFIX : <http://rdf.freebase.com/ns/> 
SELECT (?x0 AS ?value) WHERE {
SELECT DISTINCT ?x0  WHERE { 
?x0 :type.object.type :aviation.airliner_accident . 
VALUES ?x1 { :m.01n8xw } 
?x0 :aviation.airliner_accident.accident_type ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(AND aviation.airliner_accident (JOIN aviation.airliner_accident.accident_type m.01n8xw))