Which American British cinematographer did M1 employ
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:film.cinematographer .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M1 .
?x0 ns:people.person.nationality ns:m.07ssc .
?x0 ns:people.person.nationality ns:m.09c7w0
}