question: Did a Italian film editor that M1 employed produce M3
query: SELECT count(*) WHERE {
  ?x0 a ns:film.editor .
  ?x0 ns:film.producer.film|ns:film.production_company.films M3 .
  ?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M1 .
  ?x0 ns:people.person.nationality ns:m.03rjj
  }