what is the aircraft which has the parent aircraft model of boeing 737-900?
Entity
m.0137k8
Boeing 737
class class entity
aviation.aircraft_line aviation.aircraft_model m.049hj8l
aviation.aircraft_line aviation.aircraft_model aviation.aircraft_model
Aircraft Line Aircraft model Boeing 737-900
none none none
aviation.aircraft_line.models_in_line aviation.aircraft_model.parent_aircraft_model
Models In Line Parent aircraft model
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.aircraft_line . 
?x1 :type.object.type :aviation.aircraft_model . 
VALUES ?x2 { :m.049hj8l } 
?x0 :aviation.aircraft_line.models_in_line ?x1 . 
?x2 :aviation.aircraft_model.parent_aircraft_model ?x1 . 
FILTER ( ?x0 != ?x1 && ?x0 != ?x2 && ?x1 != ?x2  )
}
}
(AND aviation.aircraft_line (JOIN aviation.aircraft_line.models_in_line (JOIN (R aviation.aircraft_model.parent_aircraft_model) m.049hj8l)))