which airport does krohn air use as its hub?
Entity Entity
m.018rz2 m.0by2pm
Molde Airport, Årø Ålesund Airport, Vigra
class entity
aviation.airport m.0b6gjhz
aviation.airport aviation.airline
Airport Krohn Air
none none
aviation.airport.hub_for
Hub for
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 :aviation.airport . 
VALUES ?x1 { :m.0b6gjhz } 
?x0 :aviation.airport.hub_for ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(AND aviation.airport (JOIN aviation.airport.hub_for m.0b6gjhz))