who designed a bipropellant rocket engine with unsymmetrical dimethylhydrazine and pressure-fed engine?
Entity
m.05_t5k
Aleksei Mihailovich Isaev
class class entity entity
spaceflight.rocket_engine_designer spaceflight.bipropellant_rocket_engine m.04qqrz m.017q1y
spaceflight.rocket_engine_designer spaceflight.bipropellant_rocket_engine spaceflight.rocket_engine_cycle spaceflight.rocket_engine_fuel
Rocket engine designer Bipropellant rocket engine Pressure-fed engine Unsymmetrical dimethylhydrazine
none none none none
spaceflight.rocket_engine_designer.rocket_engines spaceflight.rocket_engine_cycle.rocket_engines spaceflight.rocket_engine_fuel.rocket_engines
Rocket engines 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_designer . 
?x1 :type.object.type :spaceflight.bipropellant_rocket_engine . 
VALUES ?x2 { :m.04qqrz } 
VALUES ?x3 { :m.017q1y } 
?x0 :spaceflight.rocket_engine_designer.rocket_engines ?x1 . 
?x2 :spaceflight.rocket_engine_cycle.rocket_engines ?x1 . 
?x3 :spaceflight.rocket_engine_fuel.rocket_engines ?x1 . 
FILTER ( ?x0 != ?x1 && ?x0 != ?x2 && ?x0 != ?x3 && ?x1 != ?x2 && ?x1 != ?x3 && ?x2 != ?x3  )
}
}
(AND spaceflight.rocket_engine_designer (JOIN spaceflight.rocket_engine_designer.rocket_engines (AND (JOIN (R spaceflight.rocket_engine_cycle.rocket_engines) m.04qqrz) (JOIN (R spaceflight.rocket_engine_fuel.rocket_engines) m.017q1y))))