Was a screenwriter influenced by M3 's art director , influenced by M1 , and influenced by M2
SELECT count(*) WHERE {
?x0 a ns:film.writer .
?x0 ns:influence.influence_node.influenced_by ?x1 .
?x0 ns:influence.influence_node.influenced_by M1 .
?x0 ns:influence.influence_node.influenced_by M2 .
?x1 ns:film.film_art_director.films_art_directed M3
}