What cinematographer of M3 and M4 was a British person employed by M1
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:people.person .
?x0 ns:film.cinematographer.film M3 .
?x0 ns:film.cinematographer.film M4 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M1 .
?x0 ns:people.person.nationality ns:m.07ssc
}