question: Was a film producer influenced by M4 's writer and influenced by M1 's Canadian American writer
query: SELECT count(*) WHERE {
  ?x0 a ns:film.producer .
  ?x0 ns:influence.influence_node.influenced_by ?x1 .
  ?x0 ns:influence.influence_node.influenced_by ?x2 .
  ?x1 ns:film.writer.film M1 .
  ?x1 ns:people.person.nationality ns:m.09c7w0 .
  ?x1 ns:people.person.nationality ns:m.0d060g .
  ?x2 ns:film.writer.film M4
  }