Did a Mexican director and writer of M0 influence a character
SELECT count(*) WHERE {
?x0 ns:film.director.film M0 .
?x0 ns:film.writer.film M0 .
?x0 ns:influence.influence_node.influenced ?x1 .
?x0 ns:people.person.nationality ns:m.0b90_r .
?x1 a ns:fictional_universe.fictional_character
}