Were M2 , M5 , M6 , and M7 produced by M1 's British editor and edited by M3 and M4
SELECT count(*) WHERE {
?x0 ns:film.editor.film M1 .
?x0 ns:people.person.nationality ns:m.07ssc .
M2 ns:film.film.edited_by M3 .
M2 ns:film.film.edited_by M4 .
M2 ns:film.film.produced_by|ns:film.film.production_companies ?x0 .
M5 ns:film.film.edited_by M3 .
M5 ns:film.film.edited_by M4 .
M5 ns:film.film.produced_by|ns:film.film.production_companies ?x0 .
M6 ns:film.film.edited_by M3 .
M6 ns:film.film.edited_by M4 .
M6 ns:film.film.produced_by|ns:film.film.production_companies ?x0 .
M7 ns:film.film.edited_by M3 .
M7 ns:film.film.edited_by M4 .
M7 ns:film.film.produced_by|ns:film.film.production_companies ?x0
}