how many web browsers support browser extension?
Value
1
class entity
computer.web_browser m.025td0g
computer.web_browser computer.software_genre
Web browser Browser extension
count none
computer.software.software_genre
Software Genre
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 . 
VALUES ?x1 { :m.025td0g } 
?x0 :computer.software.software_genre ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(COUNT (AND computer.web_browser (JOIN computer.software.software_genre m.025td0g)))