question: Did a film director that M2 influenced , M3 influenced , and a art director was influenced by influence M1
query: SELECT count(*) WHERE {
  ?x0 a ns:film.director .
  ?x0 ns:influence.influence_node.influenced ?x1 .
  ?x0 ns:influence.influence_node.influenced M1 .
  ?x0 ns:influence.influence_node.influenced_by M2 .
  ?x0 ns:influence.influence_node.influenced_by M3 .
  ?x1 a ns:film.film_art_director
  }