which public library is in the library system of mattapoisett public library?
Entity
m.0j924dn
Mattapoisett Public Library Central Library
class entity
library.public_library m.02ng86f
library.public_library library.public_library_system
Public Library Mattapoisett Public Library
none none
library.public_library.library_system
Library System
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 :library.public_library . 
VALUES ?x1 { :m.02ng86f } 
?x0 :library.public_library.library_system ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(AND library.public_library (JOIN library.public_library.library_system m.02ng86f))