what is the name of the in development status rocket?
Entity
m.02p3w3
Skylon
class entity
spaceflight.rocket m.04dwr9y
spaceflight.rocket spaceflight.rocket_status
Rocket In development
none none
spaceflight.rocket.status
Status
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 . 
VALUES ?x1 { :m.04dwr9y } 
?x0 :spaceflight.rocket.status ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(AND spaceflight.rocket (JOIN spaceflight.rocket.status m.04dwr9y))