what type of genre of broadcast content has a start production date before 1988?
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 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.01z02hx m.04rlf m.06n90 m.0g65_ m.0ggq0m m.03fpg m.06q7n m.09xp_ m.0c4xc m.07dn1 m.01tz3c m.01m1y m.028v3 m.05jhg m.06nbt m.0m1xv m.0gf28 m.01jdpf m.01p_2p m.03btxkq m.03btxkz m.02wvsdl m.06mq7 m.04xk5b m.025klt m.0fdjb m.04f0p78 m.0f9vg m.03bt1gh m.03bx3n m.03bt1j9 m.03d5x_s m.03m09f5 m.0645scb
Public affairs Children's radio series Educational Radio Comedy Horror Country Folk music Mystery Sports films Music Science Fiction Adventure game Classical music Game show Soap opera Cricket Sitcom Talk radio Anthology Celtic music Detective fiction News Satire Talk show Parody Interview Latin jazz Society Culture Variety Science Religious broadcasting Radio comedy Supernatural Current events Radio drama Games Current affairs Hobbies Public Radio Automotive Radio concert Series
class class literal
broadcast.genre broadcast.content 1988^^http://www.w3.org/2001/XMLSchema#gYear
broadcast.genre broadcast.content type.datetime
Broadcast Genre Broadcast Content 1988
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 < "1988-08:00"^^<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 1988^^http://www.w3.org/2001/XMLSchema#gYear)))