for acmgis 2012, what are the conference proceedings?
Entity
m.0jz_d_y
ACM SIG Proceeding
class entity
conferences.conference_proceedings m.0jz_c34
conferences.conference_proceedings conferences.conference
Conference proceedings ACMGIS 2012
none none
conferences.conference_proceedings.conference
Conference
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 :conferences.conference_proceedings . 
VALUES ?x1 { :m.0jz_c34 } 
?x0 :conferences.conference_proceedings.conference ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(AND conferences.conference_proceedings (JOIN conferences.conference_proceedings.conference m.0jz_c34))