What did a person that directed M1 and M2 and directed M3 executive produce and produce
SELECT DISTINCT ?x0 WHERE {
?x0 ns:film.film.executive_produced_by ?x1 .
?x0 ns:film.film.produced_by|ns:film.film.production_companies ?x1 .
?x1 a ns:people.person .
?x1 ns:film.director.film M1 .
?x1 ns:film.director.film M2 .
?x1 ns:film.director.film M3
}