What film producer was a British actor whose employer was founded by M3 and was founded by M4
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:film.actor .
?x0 a ns:film.producer .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company ?x1 .
?x0 ns:people.person.nationality ns:m.07ssc .
?x1 ns:organization.organization.founders M3 .
?x1 ns:organization.organization.founders M4
}