Were M3 and M5 executive produced by a British director of M1 and M2 and executive produced by M4
SELECT count(*) WHERE {
?x0 ns:film.director.film M1 .
?x0 ns:film.director.film M2 .
?x0 ns:people.person.nationality ns:m.07ssc .
M3 ns:film.film.executive_produced_by ?x0 .
M3 ns:film.film.executive_produced_by M4 .
M5 ns:film.film.executive_produced_by ?x0 .
M5 ns:film.film.executive_produced_by M4
}