can you tell me the signal modulation mode of the child modulation quadrature amplitude modulation?
Entity Entity Entity
m.04q2nlc m.0c32f2 m.0mcq
Quadrature modulation Digital modulation Amplitude modulation
class entity
engineering.signal_modulation_mode m.06bcg
engineering.signal_modulation_mode engineering.signal_modulation_mode
Signal Modulation Mode Quadrature amplitude modulation
none none
engineering.signal_modulation_mode.child_modulation
Child Modulation
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 :engineering.signal_modulation_mode . 
VALUES ?x1 { :m.06bcg } 
?x0 :engineering.signal_modulation_mode.child_modulation ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(AND engineering.signal_modulation_mode (JOIN engineering.signal_modulation_mode.child_modulation m.06bcg))