Did M0 and M3 executive produce M1 and executive produce M2
SELECT count(*) WHERE {
M0 ns:film.producer.films_executive_produced M1 .
M0 ns:film.producer.films_executive_produced M2 .
M3 ns:film.producer.films_executive_produced M1 .
M3 ns:film.producer.films_executive_produced M2
}