question: Were M2 , M3 , M4 , M5 , M6 , M7 , and M8 influenced by a Mexican film producer
query: SELECT count(*) WHERE {
  ?x0 a ns:film.producer .
  ?x0 ns:people.person.nationality ns:m.0b90_r .
  M2 ns:influence.influence_node.influenced_by ?x0 .
  M3 ns:influence.influence_node.influenced_by ?x0 .
  M4 ns:influence.influence_node.influenced_by ?x0 .
  M5 ns:influence.influence_node.influenced_by ?x0 .
  M6 ns:influence.influence_node.influenced_by ?x0 .
  M7 ns:influence.influence_node.influenced_by ?x0 .
  M8 ns:influence.influence_node.influenced_by ?x0
  }