question: What British cinematographer of M1 , M2 , M3 , and M4 was a company 's employee
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 ns:film.cinematographer.film M1 .
  ?x0 ns:film.cinematographer.film M2 .
  ?x0 ns:film.cinematographer.film M3 .
  ?x0 ns:film.cinematographer.film M4 .
  ?x0 ns:people.person.employment_history/ns:business.employment_tenure.company ?x1 .
  ?x0 ns:people.person.nationality ns:m.07ssc .
  ?x1 a ns:business.employer
  }