the book dune messiah includes which characters?
Entity Entity Entity Entity Entity Entity
m.01b61d m.023jgs m.01vfq3 m.02zcty m.045bj3 m.0cw39
Leto Atreides II Chani Gaius Helen Mohiam Hayt Scytale Paul Atreides
class entity
book.book_character m.02cxx
book.book_character book.book
Book Character Dune Messiah
none none
book.book_character.appears_in_book
Appears In Books
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 :book.book_character . 
VALUES ?x1 { :m.02cxx } 
?x0 :book.book_character.appears_in_book ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(AND book.book_character (JOIN book.book_character.appears_in_book m.02cxx))