question: Were M1 and M4 influenced by a producer and executive producer of a film and influenced by M2 and M3
query: SELECT count(*) WHERE {
  ?x0 ns:film.producer.films_executive_produced ?x1 .
  ?x0 ns:film.producer.film|ns:film.production_company.films ?x1 .
  ?x1 a ns:film.film .
  M1 ns:influence.influence_node.influenced_by ?x0 .
  M1 ns:influence.influence_node.influenced_by M2 .
  M1 ns:influence.influence_node.influenced_by M3 .
  M4 ns:influence.influence_node.influenced_by ?x0 .
  M4 ns:influence.influence_node.influenced_by M2 .
  M4 ns:influence.influence_node.influenced_by M3
  }