which ski run ran by supreme is rated by blue square?
Entity Entity Entity Entity Entity
m.04knmp6 m.04knmmq m.04knmq6 m.04knmsg m.04knmsq
3 Bears Rock N' Roll Big Dipper Sleepy Hollow Upper Big Dipper
class class entity entity
skiing.ski_run skiing.run_rating m.04knmg3 m.04kk20l
skiing.ski_run skiing.run_rating skiing.run_rating_symbol skiing.ski_lift
Ski Run Run rating Blue square Supreme
none none none none
skiing.ski_run.rating skiing.run_rating_symbol.run_rating skiing.ski_run.served_by
Rating Run rating Served By
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 :skiing.ski_run . 
?x1 :type.object.type :skiing.run_rating . 
VALUES ?x2 { :m.04knmg3 } 
VALUES ?x3 { :m.04kk20l } 
?x0 :skiing.ski_run.rating ?x1 . 
?x2 :skiing.run_rating_symbol.run_rating ?x1 . 
?x0 :skiing.ski_run.served_by ?x3 . 
FILTER ( ?x0 != ?x1 && ?x0 != ?x2 && ?x0 != ?x3 && ?x1 != ?x2 && ?x1 != ?x3 && ?x2 != ?x3  )
}
}
(AND skiing.ski_run (AND (JOIN skiing.ski_run.rating (JOIN (R skiing.run_rating_symbol.run_rating) m.04knmg3)) (JOIN skiing.ski_run.served_by m.04kk20l)))