the ubuntu operating system was created by whom?
Entity
m.045s92
Canonical
class entity
computer.operating_system_developer m.07z0l4l
computer.operating_system_developer computer.operating_system
Operating System Developer ubuntu
none none
computer.operating_system_developer.operating_systems_developed
Operating Systems Developed
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 . 
VALUES ?x1 { :m.07z0l4l } 
?x0 :computer.operating_system_developer.operating_systems_developed ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(AND computer.operating_system_developer (JOIN computer.operating_system_developer.operating_systems_developed m.07z0l4l))