liquid hydrogen is a fuel for what bipropellant rocket engine?
Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity
m.032blg m.07kfw0m m.0czj6d m.02xltbl m.0351y6 m.026xrt0 m.02xhkbz m.043jfp m.02xlw0x m.02xlw36 m.026rhjc m.034_q7
Space Shuttle main engine RD-0146 M-1 RD-350 RL10 HM7B RD-0120 RS-68 RD-135 RD-130 Vinci Rocketdyne J-2
class entity
spaceflight.bipropellant_rocket_engine m.0g0nz
spaceflight.bipropellant_rocket_engine spaceflight.rocket_engine_fuel
Bipropellant rocket engine Liquid hydrogen
none none
spaceflight.bipropellant_rocket_engine.fuel
Fuel
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.bipropellant_rocket_engine . 
VALUES ?x1 { :m.0g0nz } 
?x0 :spaceflight.bipropellant_rocket_engine.fuel ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(AND spaceflight.bipropellant_rocket_engine (JOIN spaceflight.bipropellant_rocket_engine.fuel m.0g0nz))