question: Did a cinematographer whose country of nationality employed M4 write and edit M1 , M2 , and M3
query: SELECT count(*) WHERE {
  ?x0 a ns:film.cinematographer .
  ?x0 ns:film.editor.film M1 .
  ?x0 ns:film.editor.film M2 .
  ?x0 ns:film.editor.film M3 .
  ?x0 ns:film.writer.film M1 .
  ?x0 ns:film.writer.film M2 .
  ?x0 ns:film.writer.film M3 .
  ?x0 ns:people.person.nationality ?x1 .
  ?x1 ns:business.employer.employees/ns:business.employment_tenure.person M4
  }