question: Were M2 and M4 influenced by a star of M1 , influenced by a character , and influenced by M3
query: SELECT count(*) WHERE {
  ?x0 a ns:fictional_universe.fictional_character .
  ?x1 ns:film.actor.film/ns:film.performance.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 .
  M4 ns:influence.influence_node.influenced_by ?x0 .
  M4 ns:influence.influence_node.influenced_by ?x1 .
  M4 ns:influence.influence_node.influenced_by M3
  }