what is the name of the designer which the roller coaster had an accident after jan. the 3rd, 1984?
Entity Entity Entity Entity
m.027lfxy m.04gvyp m.06vnh2 m.046k63
Tony Baxter Walt Disney Imagineering Werner Stengel Arrow Dynamics
class class class literal
amusement_parks.ride_designer amusement_parks.roller_coaster amusement_parks.accident 1984-01-03^^http://www.w3.org/2001/XMLSchema#date
amusement_parks.ride_designer amusement_parks.roller_coaster amusement_parks.accident type.datetime
Amusement Ride Designer Roller Coaster Amusement Ride Accident Jan. the 3rd, 1984
none none none >=
amusement_parks.ride_designer.rides amusement_parks.accident.ride amusement_parks.accident.date
Rides Designed Ride Date
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 :amusement_parks.ride_designer . 
?x1 :type.object.type :amusement_parks.roller_coaster . 
?x2 :type.object.type :amusement_parks.accident . 
FILTER (?x3 >= "1984-01-03-08:00"^^<http://www.w3.org/2001/XMLSchema#date>)
?x0 :amusement_parks.ride_designer.rides ?x1 . 
?x2 :amusement_parks.accident.ride ?x1 . 
?x2 :amusement_parks.accident.date ?x3 . 
FILTER ( ?x0 != ?x1 && ?x0 != ?x2 && ?x0 != ?x3 && ?x1 != ?x2 && ?x1 != ?x3 && ?x2 != ?x3  )
}
}
(AND amusement_parks.ride_designer (JOIN amusement_parks.ride_designer.rides (JOIN (R amusement_parks.accident.ride) (ge amusement_parks.accident.date 1984-01-03^^http://www.w3.org/2001/XMLSchema#date))))