Did a American director of M2 , M3 , and M4 edit M0
SELECT count(*) WHERE {
?x0 ns:film.director.film M2 .
?x0 ns:film.director.film M3 .
?x0 ns:film.director.film M4 .
?x0 ns:film.editor.film M0 .
?x0 ns:people.person.nationality ns:m.09c7w0
}