find a genre of a broadcast content that has a production start date before 1955.
Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity
m.026pm0p m.0645qh1 m.0645qx2 m.05p553 m.03npn m.01lyv m.02w4v m.02n4kr m.04rlf m.06n90 m.0g65_ m.03fpg m.06q7n m.0c4xc m.07dn1 m.01tz3c m.028v3 m.06nbt m.0gf28 m.04xk5b m.025klt m.0fdjb m.04f0p78 m.0f9vg m.0645scb
Public affairs Children's radio series Educational Radio Comedy Horror Country Folk music Mystery Music Science Fiction Adventure game Game show Soap opera Sitcom Talk radio Anthology Detective fiction Satire Parody Religious broadcasting Radio comedy Supernatural Current events Radio drama Radio concert Series
class class literal
broadcast.genre broadcast.content 1955^^http://www.w3.org/2001/XMLSchema#gYear
broadcast.genre broadcast.content type.datetime
Broadcast Genre Broadcast Content 1955
none none <
broadcast.content.genre broadcast.content.production_start
Genres Production Start
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 :broadcast.genre . 
?x1 :type.object.type :broadcast.content . 
FILTER (?x2 < "1955-08:00"^^<http://www.w3.org/2001/XMLSchema#gYear>)
?x1 :broadcast.content.genre ?x0 . 
?x1 :broadcast.content.production_start ?x2 . 
FILTER ( ?x0 != ?x1 && ?x0 != ?x2 && ?x1 != ?x2  )
}
}
(AND broadcast.genre (JOIN (R broadcast.content.genre) (lt broadcast.content.production_start 1955^^http://www.w3.org/2001/XMLSchema#gYear)))