Was M0 's employee a editor and producer of M1 and M2
SELECT count(*) WHERE {
?x0 ns:film.editor.film M1 .
?x0 ns:film.editor.film M2 .
?x0 ns:film.producer.film|ns:film.production_company.films M1 .
?x0 ns:film.producer.film|ns:film.production_company.films M2 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M0
}