What British film producer that M1 was written by and produced by was employed by M2 and founded M3
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:film.producer .
?x0 ns:film.producer.film|ns:film.production_company.films M1 .
?x0 ns:film.writer.film M1 .
?x0 ns:organization.organization_founder.organizations_founded M3 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M2 .
?x0 ns:people.person.nationality ns:m.07ssc
}