question: Were M1 and M2 influenced by a executive producer and star of M0 's sequel
query: SELECT count(*) WHERE {
  ?x0 ns:film.actor.film/ns:film.performance.film ?x1 .
  ?x0 ns:film.producer.films_executive_produced ?x1 .
  ?x1 ns:film.film.prequel M0 .
  M1 ns:influence.influence_node.influenced_by ?x0 .
  M2 ns:influence.influence_node.influenced_by ?x0
  }