Was M1 a production company whose employee edited , directed , and wrote M0
SELECT count(*) WHERE {
?x0 ns:film.director.film M0 .
?x0 ns:film.editor.film M0 .
?x0 ns:film.writer.film M0 .
M1 a ns:film.production_company .
M1 ns:business.employer.employees/ns:business.employment_tenure.person ?x0
}