fieldstone is the construction material of what lighthouses?
Entity Entity Entity
m.0278xlg m.0d7xfc m.0dxdg0
Barcelona Light Stony Point Light Coast Guard Station Eatons Neck
class entity
architecture.lighthouse m.0gl44_
architecture.lighthouse architecture.lighthouse_construction_material
Lighthouse Fieldstone
none none
architecture.lighthouse.construction
Construction
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 :architecture.lighthouse . 
VALUES ?x1 { :m.0gl44_ } 
?x0 :architecture.lighthouse.construction ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(AND architecture.lighthouse (JOIN architecture.lighthouse.construction m.0gl44_))