what is the name of the industry that has the child of child industry connected to south wales miners' federation?
Entity Entity
m.03q9vxc m.03q9w2r
Coal Mining Support Activities for Mining
class class class entity
business.industry business.industry business.industry m.027pbrg
business.industry business.industry business.industry business.trade_union
Industry Industry Industry South Wales Miners' Federation
none none none none
business.industry.child_industry business.industry.child_industry business.trade_union.industry
Child Industry Child Industry Industry
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 :business.industry . 
?x1 :type.object.type :business.industry . 
?x2 :type.object.type :business.industry . 
VALUES ?x3 { :m.027pbrg } 
?x0 :business.industry.child_industry ?x1 . 
?x2 :business.industry.child_industry ?x1 . 
?x3 :business.trade_union.industry ?x2 . 
FILTER ( ?x0 != ?x1 && ?x0 != ?x2 && ?x0 != ?x3 && ?x1 != ?x2 && ?x1 != ?x3 && ?x2 != ?x3  )
}
}
(AND business.industry (JOIN business.industry.child_industry (JOIN (R business.industry.child_industry) (JOIN (R business.trade_union.industry) m.027pbrg))))