question: Was M2 a character that was influenced by M4 , influenced a screenwriter , and was influenced by M1 's writer
query: SELECT count(*) WHERE {
  ?x0 a ns:film.writer .
  ?x1 ns:film.writer.film M1 .
  M2 a ns:fictional_universe.fictional_character .
  M2 ns:influence.influence_node.influenced ?x0 .
  M2 ns:influence.influence_node.influenced_by ?x1 .
  M2 ns:influence.influence_node.influenced_by M4
  }