the rd-511 rocket engines are fueled by which rocket engine fuel?
Entity
m.04bhf
Kerosene
class entity
spaceflight.rocket_engine_fuel m.02xlt7j
spaceflight.rocket_engine_fuel spaceflight.bipropellant_rocket_engine
Rocket engine fuel RD-511
none none
spaceflight.rocket_engine_fuel.rocket_engines
Rocket engines
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 :spaceflight.rocket_engine_fuel . 
VALUES ?x1 { :m.02xlt7j } 
?x0 :spaceflight.rocket_engine_fuel.rocket_engines ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(AND spaceflight.rocket_engine_fuel (JOIN spaceflight.rocket_engine_fuel.rocket_engines m.02xlt7j))