what is the name of the automobile model whose successor is reva ac?
Entity
m.03hcj51
REVA DC
class entity
automotive.model m.03hcj5c
automotive.model automotive.model
Automobile Model REVA AC
none none
automotive.model.successor
Successor
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 :automotive.model . 
VALUES ?x1 { :m.03hcj5c } 
?x0 :automotive.model.successor ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(AND automotive.model (JOIN automotive.model.successor m.03hcj5c))