question: Was a character influenced by a character and influenced by a film producer that M2 starred
query: SELECT count(*) WHERE {
  ?x0 a ns:fictional_universe.fictional_character .
  ?x0 ns:influence.influence_node.influenced_by ?x1 .
  ?x0 ns:influence.influence_node.influenced_by ?x2 .
  ?x1 a ns:fictional_universe.fictional_character .
  ?x2 a ns:film.producer .
  ?x2 ns:film.actor.film/ns:film.performance.film M2
  }