question: Did M3 influence a Swedish writer of M0 and M1
query: SELECT count(*) WHERE {
  ?x0 ns:film.writer.film M0 .
  ?x0 ns:film.writer.film M1 .
  ?x0 ns:people.person.nationality ns:m.0d0vqn .
  M3 ns:influence.influence_node.influenced ?x0
  }