Were M3 and M4 written by a screenwriter 's child and executive produced by a Mexican actor
SELECT count(*) WHERE {
?x0 a ns:film.actor .
?x0 ns:people.person.nationality ns:m.0b90_r .
?x1 ns:people.person.parents|ns:fictional_universe.fictional_character.parents|ns:organization.organization.parent/ns:organization.organization_relationship.parent ?x2 .
?x2 a ns:film.writer .
M3 ns:film.film.executive_produced_by ?x0 .
M3 ns:film.film.written_by ?x1 .
M4 ns:film.film.executive_produced_by ?x0 .
M4 ns:film.film.written_by ?x1
}