Did a American person edit M1 , M2 , M3 , and M4
SELECT count(*) WHERE {
?x0 a ns:people.person .
?x0 ns:film.editor.film M1 .
?x0 ns:film.editor.film M2 .
?x0 ns:film.editor.film M3 .
?x0 ns:film.editor.film M4 .
?x0 ns:people.person.nationality ns:m.09c7w0
}