philadelphia union participated in which football league?
Entity
m.0jfpf
Major League Soccer
class class entity
soccer.football_league soccer.football_league_participation m.03mck3c
soccer.football_league soccer.football_league_participation soccer.football_team
Football League Football League Participation Philadelphia Union
none none none
soccer.football_league_participation.league soccer.football_team.league
League League
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 :soccer.football_league . 
?x1 :type.object.type :soccer.football_league_participation . 
VALUES ?x2 { :m.03mck3c } 
?x1 :soccer.football_league_participation.league ?x0 . 
?x2 :soccer.football_team.league ?x1 . 
FILTER ( ?x0 != ?x1 && ?x0 != ?x2 && ?x1 != ?x2  )
}
}
(AND soccer.football_league (JOIN (R soccer.football_league_participation.league) (JOIN (R soccer.football_team.league) m.03mck3c)))