Was a film producer influenced by M1 and M2 , influenced by M3 , and influenced by M4 's Mexican executive producer
SELECT count(*) WHERE {
?x0 a ns:film.producer .
?x0 ns:influence.influence_node.influenced_by ?x1 .
?x0 ns:influence.influence_node.influenced_by M1 .
?x0 ns:influence.influence_node.influenced_by M2 .
?x0 ns:influence.influence_node.influenced_by M3 .
?x1 ns:film.producer.films_executive_produced M4 .
?x1 ns:people.person.nationality ns:m.0b90_r
}