question: Did a art director influence M1 and influence M2 's prequel 's writer
query: SELECT count(*) WHERE {
  ?x0 a ns:film.film_art_director .
  ?x0 ns:influence.influence_node.influenced ?x1 .
  ?x0 ns:influence.influence_node.influenced M1 .
  ?x1 ns:film.writer.film ?x2 .
  ?x2 ns:film.film.sequel M2
  }