question: Did a screenwriter that M1 influenced and was influenced by influence a actor
query: SELECT count(*) WHERE {
  ?x0 a ns:film.writer .
  ?x0 ns:influence.influence_node.influenced ?x1 .
  ?x0 ns:influence.influence_node.influenced M1 .
  ?x0 ns:influence.influence_node.influenced_by M1 .
  ?x1 a ns:film.actor
  }