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