question: Did M2 and M3 star a film director influenced by M1
query: SELECT count(*) WHERE {
  ?x0 a ns:film.director .
  ?x0 ns:influence.influence_node.influenced_by M1 .
  M2 ns:film.film.starring/ns:film.performance.actor ?x0 .
  M3 ns:film.film.starring/ns:film.performance.actor ?x0
  }