what kind of rocket fuel has no less than 1 stage?
Entity Entity Entity
m.021vvd m.01tm_5 m.0g0nz
RP-1 Liquid oxygen Liquid hydrogen
class class literal
spaceflight.rocket_fuel spaceflight.rocket_stage 1^^http://www.w3.org/2001/XMLSchema#integer
spaceflight.rocket_fuel spaceflight.rocket_stage type.int
Rocket Fuel Rocket Stage 1
none none >=
spaceflight.rocket_fuel.rocket_stages spaceflight.rocket_stage.stage_number
Rockets Stage Number
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_fuel . 
?x1 :type.object.type :spaceflight.rocket_stage . 
FILTER (?x2 >= "1"^^<http://www.w3.org/2001/XMLSchema#integer>)
?x0 :spaceflight.rocket_fuel.rocket_stages ?x1 . 
?x1 :spaceflight.rocket_stage.stage_number ?x2 . 
FILTER ( ?x0 != ?x1 && ?x0 != ?x2 && ?x1 != ?x2  )
}
}
(AND spaceflight.rocket_fuel (JOIN spaceflight.rocket_fuel.rocket_stages (ge spaceflight.rocket_stage.stage_number 1^^http://www.w3.org/2001/XMLSchema#integer)))