how many exhibition subjects are the subject of an exhibition curated by carlene stephens?
Value
2
class class entity
exhibitions.exhibition_subject exhibitions.exhibition m.09vxlc8
exhibitions.exhibition_subject exhibitions.exhibition exhibitions.exhibition_curator
Exhibition subject Exhibition Carlene Stephens
count none none
exhibitions.exhibition_subject.exhibitions_created_about_this_subject exhibitions.exhibition_curator.exhibitions_curated
Exhibitions created about this subject Exhibitions curated
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 (COUNT(?x0) AS ?value) WHERE {
SELECT DISTINCT ?x0  WHERE { 
?x0 :type.object.type :exhibitions.exhibition_subject . 
?x1 :type.object.type :exhibitions.exhibition . 
VALUES ?x2 { :m.09vxlc8 } 
?x0 :exhibitions.exhibition_subject.exhibitions_created_about_this_subject ?x1 . 
?x2 :exhibitions.exhibition_curator.exhibitions_curated ?x1 . 
FILTER ( ?x0 != ?x1 && ?x0 != ?x2 && ?x1 != ?x2  )
}
}
(COUNT (AND exhibitions.exhibition_subject (JOIN exhibitions.exhibition_subject.exhibitions_created_about_this_subject (JOIN (R exhibitions.exhibition_curator.exhibitions_curated) m.09vxlc8))))