Did M4 edit M5 and M6 and edit a film that starred M1 , M2 , and M3
SELECT count(*) WHERE {
?x0 a ns:film.film .
?x0 ns:film.film.starring/ns:film.performance.actor M1 .
?x0 ns:film.film.starring/ns:film.performance.actor M2 .
?x0 ns:film.film.starring/ns:film.performance.actor M3 .
M4 ns:film.editor.film ?x0 .
M4 ns:film.editor.film M5 .
M4 ns:film.editor.film M6
}