question: Was M4 's producer a Chinese cinematographer employed by M1 and employed by M2
query: SELECT count(*) WHERE {
  ?x0 a ns:film.cinematographer .
  ?x0 ns:film.producer.film|ns:film.production_company.films M4 .
  ?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M1 .
  ?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M2 .
  ?x0 ns:people.person.nationality ns:m.0d05w3
  }