the parent os of windows was developed by who?
Entity
m.04sv4
Microsoft Corporation
class class entity
computer.operating_system_developer computer.operating_system m.016jsf
computer.operating_system_developer computer.operating_system computer.operating_system
Operating System Developer Operating System windows
none none none
computer.operating_system_developer.operating_systems_developed computer.operating_system.parent_os
Operating Systems Developed Parent OS
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 :computer.operating_system_developer . 
?x1 :type.object.type :computer.operating_system . 
VALUES ?x2 { :m.016jsf } 
?x0 :computer.operating_system_developer.operating_systems_developed ?x1 . 
?x1 :computer.operating_system.parent_os ?x2 . 
FILTER ( ?x0 != ?x1 && ?x0 != ?x2 && ?x1 != ?x2  )
}
}
(AND computer.operating_system_developer (JOIN computer.operating_system_developer.operating_systems_developed (JOIN computer.operating_system.parent_os m.016jsf)))