question: Did M3 and M4 influence a person that executive produced and directed M1 and M2
query: SELECT count(*) WHERE {
  ?x0 a ns:people.person .
  ?x0 ns:film.director.film M1 .
  ?x0 ns:film.director.film M2 .
  ?x0 ns:film.producer.films_executive_produced M1 .
  ?x0 ns:film.producer.films_executive_produced M2 .
  M3 ns:influence.influence_node.influenced ?x0 .
  M4 ns:influence.influence_node.influenced ?x0
  }