question: Was a actor influenced by a art director that M2 employed
query: SELECT count(*) WHERE {
  ?x0 a ns:film.actor .
  ?x0 ns:influence.influence_node.influenced_by ?x1 .
  ?x1 a ns:film.film_art_director .
  ?x1 ns:people.person.employment_history/ns:business.employment_tenure.company M2
  }