the parent rock type of which rock type is metamorphic rocks?
Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity
m.04tdh m.0c1ml m.0c5l2 m.03g05 m.029zr1 m.040hdt m.01sg1m m.01pxzp m.025wtgd m.02d09s m.03c2mlj m.03krrq m.04k3ss m.04kksm m.04l481 m.051qhr m.05q9qvj m.06g8_d m.07gyrt m.07tf6h m.08qspn m.0bxnh
Marble Slate Soapstone Gneiss Quartzite Eclogite Amphibolite Migmatite Talc carbonate Skarn Psammite Phyllite Granulite Hornfels Blueschist Serpentinite Suevite Gossan Pelite Greenschist Mylonite Schist
class entity
geology.rock_type m.0c3c0
geology.rock_type geology.rock_type
Rock type metamorphic rocks
none none
geology.rock_type.parent_rock_type
Parent rock type
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 :geology.rock_type . 
VALUES ?x1 { :m.0c3c0 } 
?x0 :geology.rock_type.parent_rock_type ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(AND geology.rock_type (JOIN geology.rock_type.parent_rock_type m.0c3c0))