what is the development update of the rocket engine that has an isp (sea level) that is no more than 260.0 and is designed by rocketdyne?
Entity
m.03p41f7
flown
class class entity literal
spaceflight.rocket_engine_status spaceflight.rocket_engine m.01vhl6 260.0^^http://www.w3.org/2001/XMLSchema#float
spaceflight.rocket_engine_status spaceflight.rocket_engine spaceflight.rocket_engine_designer type.float
Rocket engine development status Rocket engine Rocketdyne 260.0
none none none <=
spaceflight.rocket_engine.status spaceflight.rocket_engine_designer.rocket_engines spaceflight.rocket_engine.isp_sea_level
Status Rocket engines Isp (sea level)
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_status . 
?x1 :type.object.type :spaceflight.rocket_engine . 
VALUES ?x2 { :m.01vhl6 } 
FILTER (?x3 <= "260.0"^^<http://www.w3.org/2001/XMLSchema#float>)
?x1 :spaceflight.rocket_engine.status ?x0 . 
?x2 :spaceflight.rocket_engine_designer.rocket_engines ?x1 . 
?x1 :spaceflight.rocket_engine.isp_sea_level ?x3 . 
FILTER ( ?x0 != ?x1 && ?x0 != ?x2 && ?x0 != ?x3 && ?x1 != ?x2 && ?x1 != ?x3 && ?x2 != ?x3  )
}
}
(AND spaceflight.rocket_engine_status (JOIN (R spaceflight.rocket_engine.status) (AND (JOIN (R spaceflight.rocket_engine_designer.rocket_engines) m.01vhl6) (le spaceflight.rocket_engine.isp_sea_level 260.0^^http://www.w3.org/2001/XMLSchema#float))))