how many publisher has the imprint perseus book group?
Value
8
class entity
book.publishing_company m.04q9fm0
book.publishing_company book.publishing_company
Publisher perseus book group
count none
book.publishing_company.imprint_of
Imprint of
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 :book.publishing_company . 
VALUES ?x1 { :m.04q9fm0 } 
?x0 :book.publishing_company.imprint_of ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(COUNT (AND book.publishing_company (JOIN book.publishing_company.imprint_of m.04q9fm0)))