what class of ships has uffa fox designed?
Entity Entity Entity Entity Entity Entity Entity Entity Entity
m.05xrmp m.028859 m.02q7ww9 m.02r3pr9 m.0340gh m.03mmss m.0bmqdx m.0d5cbd m.0g1ssw
Firefly Albacore Pegasus Dinghy Jolly Boat National 12 Javelin dinghy International 14 Flying Fifteen Day Sailer
class entity
boats.ship_class m.03mmmn
boats.ship_class boats.ship_designer
Ship class Uffa Fox
none none
boats.ship_class.designer
Designer
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 :boats.ship_class . 
VALUES ?x1 { :m.03mmmn } 
?x0 :boats.ship_class.designer ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(AND boats.ship_class (JOIN boats.ship_class.designer m.03mmmn))