Were M3 , M4 , M5 , and M6 influenced by a Mexican executive producer of M0 and M1
SELECT count(*) WHERE {
?x0 ns:film.producer.films_executive_produced M0 .
?x0 ns:film.producer.films_executive_produced M1 .
?x0 ns:people.person.nationality ns:m.0b90_r .
M3 ns:influence.influence_node.influenced_by ?x0 .
M4 ns:influence.influence_node.influenced_by ?x0 .
M5 ns:influence.influence_node.influenced_by ?x0 .
M6 ns:influence.influence_node.influenced_by ?x0
}