question: Who was influenced by M2 's American director
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:people.person .
  ?x0 ns:influence.influence_node.influenced_by ?x1 .
  ?x1 ns:film.director.film M2 .
  ?x1 ns:people.person.nationality ns:m.09c7w0
  }