what is the number of web browsers that are open-sourced under non-free software and support programming languages designed by brad cox?
Value
1
class class entity entity
computer.web_browser computer.programming_language m.067xd m.019z3k
computer.web_browser computer.programming_language computer.software_license computer.programming_language_designer
Web browser Programming Language non-free software Brad Cox
count none none none
computer.software.languages_used computer.software.license computer.programming_language_designer.languages_designed
Programming languages used License Languages Designed
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 :computer.web_browser . 
?x1 :type.object.type :computer.programming_language . 
VALUES ?x2 { :m.067xd } 
VALUES ?x3 { :m.019z3k } 
?x0 :computer.software.languages_used ?x1 . 
?x0 :computer.software.license ?x2 . 
?x3 :computer.programming_language_designer.languages_designed ?x1 . 
FILTER ( ?x0 != ?x1 && ?x0 != ?x2 && ?x0 != ?x3 && ?x1 != ?x2 && ?x1 != ?x3 && ?x2 != ?x3  )
}
}
(COUNT (AND computer.web_browser (AND (JOIN computer.software.languages_used (JOIN (R computer.programming_language_designer.languages_designed) m.019z3k)) (JOIN computer.software.license m.067xd))))