question: Did M2 employ a actor that M1 was directed by and edited by
query: SELECT count(*) WHERE {
  ?x0 a ns:film.actor .
  ?x0 ns:film.director.film M1 .
  ?x0 ns:film.editor.film M1 .
  M2 ns:business.employer.employees/ns:business.employment_tenure.person ?x0
  }