What was a production company whose employee and founder executive produced M1
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:film.production_company .
?x0 ns:business.employer.employees/ns:business.employment_tenure.person ?x1 .
?x0 ns:organization.organization.founders ?x1 .
?x1 ns:film.producer.films_executive_produced M1
}