question: Did M2 and M3 influence a Swedish film producer
query: SELECT count(*) WHERE {
  ?x0 a ns:film.producer .
  ?x0 ns:people.person.nationality ns:m.0d0vqn .
  M2 ns:influence.influence_node.influenced ?x0 .
  M3 ns:influence.influence_node.influenced ?x0
  }