what is the transport operator of the transportation that has terminus at transbay terminal?
Entity Entity Entity Entity
m.01lk7v m.02rm6m m.03cds7 m.02959z
San Francisco Muni AC Transit WestCAT Greyhound Lines
class class entity
travel.transport_operator travel.transportation m.05cwk5
travel.transport_operator travel.transportation travel.transport_terminus
Transport operator Transportation transbay terminal
none none none
travel.transport_operator.travel_destinations_served travel.transportation.transport_terminus
Travel destinations served Transport terminus
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 :travel.transport_operator . 
?x1 :type.object.type :travel.transportation . 
VALUES ?x2 { :m.05cwk5 } 
?x0 :travel.transport_operator.travel_destinations_served ?x1 . 
?x1 :travel.transportation.transport_terminus ?x2 . 
FILTER ( ?x0 != ?x1 && ?x0 != ?x2 && ?x1 != ?x2  )
}
}
(AND travel.transport_operator (JOIN travel.transport_operator.travel_destinations_served (JOIN travel.transportation.transport_terminus m.05cwk5)))