which metal material has two parent classes and what are they?
Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity
m.0fvrsk m.06qqv m.08g_fq m.0_1c0 m.0261kyp m.04mkrtb m.02yxm_ m.065zbvt m.04wl9d m.03q7n00 m.03qrct3 m.0gbt_r_ m.0gbt_p_ m.0gbt_qg m.02yxpg m.010vv6qw
Alloy steel Stainless steel Weathering steel Cast iron 6061 aluminium alloy Aluminum Alloy 2024 Carbon steel Deoxidized steel Maraging steel copper wire Galvanized steel C355 Aluminium Alloy A356 Aluminum Alloy D357 Aluminum Alloy Tool steel MS Pipe, MS Tube
class class entity
engineering.material engineering.material m.04t7l
engineering.material engineering.material engineering.material
Material Material Metal
none none none
engineering.material.parent_material_class engineering.material.subclass
Parent material class Child 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 . 
?x1 :type.object.type :engineering.material . 
VALUES ?x2 { :m.04t7l } 
?x0 :engineering.material.parent_material_class ?x1 . 
?x2 :engineering.material.subclass ?x1 . 
FILTER ( ?x0 != ?x1 && ?x0 != ?x2 && ?x1 != ?x2  )
}
}
(AND engineering.material (JOIN engineering.material.parent_material_class (JOIN (R engineering.material.subclass) m.04t7l)))