What was a company whose employee edited M1 , M2 , and M3
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:business.employer .
?x0 ns:business.employer.employees/ns:business.employment_tenure.person ?x1 .
?x1 ns:film.editor.film M1 .
?x1 ns:film.editor.film M2 .
?x1 ns:film.editor.film M3
}