question: Did M2 marry M0 's American writer , influence M3 and M4 , and influence M5
query: SELECT count(*) WHERE {
  ?x0 ns:film.writer.film M0 .
  ?x0 ns:people.person.nationality ns:m.09c7w0 .
  FILTER ( M2 != ?x0 ) .
  M2 ns:influence.influence_node.influenced M3 .
  M2 ns:influence.influence_node.influenced M4 .
  M2 ns:influence.influence_node.influenced M5 .
  M2 ns:people.person.spouse_s/ns:people.marriage.spouse|ns:fictional_universe.fictional_character.married_to/ns:fictional_universe.marriage_of_fictional_characters.spouses ?x0
  }