question: Was M2 a film whose writer and star influenced M0 and M1
query: SELECT count(*) WHERE {
  ?x0 ns:influence.influence_node.influenced M0 .
  ?x0 ns:influence.influence_node.influenced M1 .
  M2 a ns:film.film .
  M2 ns:film.film.starring/ns:film.performance.actor ?x0 .
  M2 ns:film.film.written_by ?x0
  }