Was a British cinematographer of M1 a company 's employee
SELECT count(*) WHERE {
?x0 ns:film.cinematographer.film M1 .
?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
}