question: Were M2 , M7 , and M8 influenced by a British screenwriter and influenced by M3 , M4 , M5 , and M6
query: SELECT count(*) WHERE {
  ?x0 a ns:film.writer .
  ?x0 ns:people.person.nationality ns:m.07ssc .
  M2 ns:influence.influence_node.influenced_by ?x0 .
  M2 ns:influence.influence_node.influenced_by M3 .
  M2 ns:influence.influence_node.influenced_by M4 .
  M2 ns:influence.influence_node.influenced_by M5 .
  M2 ns:influence.influence_node.influenced_by M6 .
  M7 ns:influence.influence_node.influenced_by ?x0 .
  M7 ns:influence.influence_node.influenced_by M3 .
  M7 ns:influence.influence_node.influenced_by M4 .
  M7 ns:influence.influence_node.influenced_by M5 .
  M7 ns:influence.influence_node.influenced_by M6 .
  M8 ns:influence.influence_node.influenced_by ?x0 .
  M8 ns:influence.influence_node.influenced_by M3 .
  M8 ns:influence.influence_node.influenced_by M4 .
  M8 ns:influence.influence_node.influenced_by M5 .
  M8 ns:influence.influence_node.influenced_by M6
  }