What did M0 and M1 executive produce and a British writer of M2 produce
SELECT DISTINCT ?x0 WHERE {
?x0 ns:film.film.executive_produced_by M0 .
?x0 ns:film.film.executive_produced_by M1 .
?x0 ns:film.film.produced_by|ns:film.film.production_companies ?x1 .
?x1 ns:film.writer.film M2 .
?x1 ns:people.person.nationality ns:m.07ssc
}