what football player positions are there on the birmingham barracudas team?
Entity
m.02qpbqj
Fullback
class class entity
sports.sports_position sports.sport m.01jvwn
sports.sports_position sports.sport american_football.football_team
Sports position Sport Birmingham Barracudas
none none none
sports.sports_position.sport sports.sports_team.sport
Sport Sport
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 :sports.sports_position . 
?x1 :type.object.type :sports.sport . 
VALUES ?x2 { :m.01jvwn } 
?x0 :sports.sports_position.sport ?x1 . 
?x2 :sports.sports_team.sport ?x1 . 
FILTER ( ?x0 != ?x1 && ?x0 != ?x2 && ?x1 != ?x2  )
}
}
(AND sports.sports_position (JOIN sports.sports_position.sport (JOIN (R sports.sports_team.sport) m.01jvwn)))