question: Was M2 a film producer that a star of M0 and M1 was influenced by and M4 influenced
query: SELECT count(*) WHERE {
  ?x0 ns:film.actor.film/ns:film.performance.film M0 .
  ?x0 ns:film.actor.film/ns:film.performance.film M1 .
  M2 a ns:film.producer .
  M2 ns:influence.influence_node.influenced ?x0 .
  M2 ns:influence.influence_node.influenced_by M4
  }