when it comes to the the roulin family series what is the subject of artwork that belongs to it?
Entity Entity Entity Entity
m.0gvnxgy m.0gvnxf3 m.0gvnxfn m.0gvnxhn
Armand Roulin Augustine Roulin Joseph Roulin Camille Roulin
class class entity
visual_art.art_subject visual_art.artwork m.0g3w3h
visual_art.art_subject visual_art.artwork visual_art.art_series
Art Subject Artwork The Roulin Family
none none none
visual_art.art_subject.artwork_on_the_subject visual_art.artwork.belongs_to_series
Artwork on the Subject Belongs to Series
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 :visual_art.art_subject . 
?x1 :type.object.type :visual_art.artwork . 
VALUES ?x2 { :m.0g3w3h } 
?x0 :visual_art.art_subject.artwork_on_the_subject ?x1 . 
?x1 :visual_art.artwork.belongs_to_series ?x2 . 
FILTER ( ?x0 != ?x1 && ?x0 != ?x2 && ?x1 != ?x2  )
}
}
(AND visual_art.art_subject (JOIN visual_art.art_subject.artwork_on_the_subject (JOIN visual_art.artwork.belongs_to_series m.0g3w3h)))