what person is responsible for developing the operating system for vax?
Entity Entity Entity
m.02zd460 m.0256cr4 m.03t4gh
University of California, Berkeley OpenBSD Project Computer Systems Research Group
class class entity
computer.operating_system_developer computer.operating_system m.07zt9
computer.operating_system_developer computer.operating_system computer.computer_processor
Operating System Developer Operating System VAX
none none none
computer.operating_system.developer computer.operating_system.supported_architectures
Developer Supported Architectures
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.07zt9 } 
?x1 :computer.operating_system.developer ?x0 . 
?x1 :computer.operating_system.supported_architectures ?x2 . 
FILTER ( ?x0 != ?x1 && ?x0 != ?x2 && ?x1 != ?x2  )
}
}
(AND computer.operating_system_developer (JOIN (R computer.operating_system.developer) (JOIN computer.operating_system.supported_architectures m.07zt9)))