Was a person that influenced M1 and was influenced by a art director M2 's producer
SELECT count(*) WHERE {
?x0 a ns:people.person .
?x0 ns:film.producer.film|ns:film.production_company.films M2 .
?x0 ns:influence.influence_node.influenced M1 .
?x0 ns:influence.influence_node.influenced_by ?x1 .
?x1 a ns:film.film_art_director
}