name the trade union of ems.
Entity
m.0c7pyx
National Emergency Medical Services Association
class entity
business.trade_union m.0dxh1
business.trade_union business.industry
Trade union ems
none none
business.trade_union.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.trade_union . 
VALUES ?x1 { :m.0dxh1 } 
?x0 :business.trade_union.industry ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(AND business.trade_union (JOIN business.trade_union.industry m.0dxh1))