describe the upper material class of metal wire.
Entity Entity Entity Entity Entity Entity
m.0blzr m.0gdsrq m.03qrbxq m.03q7n00 m.07qj62 m.03qrc3f
Barbed wire Magnet wire Brass wire copper wire Aluminum wire Steel wire
class entity
engineering.material m.083kv
engineering.material engineering.material
Material metal wire
none none
engineering.material.parent_material_class
Parent material class
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 :engineering.material . 
VALUES ?x1 { :m.083kv } 
?x0 :engineering.material.parent_material_class ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(AND engineering.material (JOIN engineering.material.parent_material_class m.083kv))