Were M2 , M3 , and M4 edited , written , and executive produced by a person that edited M1
SELECT count(*) WHERE {
?x0 a ns:people.person .
?x0 ns:film.editor.film M1 .
M2 ns:film.film.edited_by ?x0 .
M2 ns:film.film.executive_produced_by ?x0 .
M2 ns:film.film.written_by ?x0 .
M3 ns:film.film.edited_by ?x0 .
M3 ns:film.film.executive_produced_by ?x0 .
M3 ns:film.film.written_by ?x0 .
M4 ns:film.film.edited_by ?x0 .
M4 ns:film.film.executive_produced_by ?x0 .
M4 ns:film.film.written_by ?x0
}