question: Which person that influenced a director and writer of M1 , M2 , and M3 did a art director marry
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:people.person .
  ?x0 ns:influence.influence_node.influenced ?x1 .
  ?x0 ns:people.person.spouse_s/ns:people.marriage.spouse|ns:fictional_universe.fictional_character.married_to/ns:fictional_universe.marriage_of_fictional_characters.spouses ?x2 .
  ?x1 ns:film.director.film M1 .
  ?x1 ns:film.director.film M2 .
  ?x1 ns:film.director.film M3 .
  ?x1 ns:film.writer.film M1 .
  ?x1 ns:film.writer.film M2 .
  ?x1 ns:film.writer.film M3 .
  ?x2 a ns:film.film_art_director .
  FILTER ( ?x0 != ?x2 )
  }