question: Was a screenwriter influenced by M1 and influenced by a art director
query: SELECT count(*) WHERE {
  ?x0 a ns:film.writer .
  ?x0 ns:influence.influence_node.influenced_by ?x1 .
  ?x0 ns:influence.influence_node.influenced_by M1 .
  ?x1 a ns:film.film_art_director
  }