question: Was M2 influenced by M3 , influenced by a person , influenced by M4 , and influenced by a director of M1
query: SELECT count(*) WHERE {
  ?x0 a ns:people.person .
  ?x1 ns:film.director.film M1 .
  M2 ns:influence.influence_node.influenced_by ?x0 .
  M2 ns:influence.influence_node.influenced_by ?x1 .
  M2 ns:influence.influence_node.influenced_by M3 .
  M2 ns:influence.influence_node.influenced_by M4
  }