What did M4 write , M0 , M1 , M2 , and M3 executive produce , and M5 and M6 write
SELECT DISTINCT ?x0 WHERE {
?x0 ns:film.film.executive_produced_by M0 .
?x0 ns:film.film.executive_produced_by M1 .
?x0 ns:film.film.executive_produced_by M2 .
?x0 ns:film.film.executive_produced_by M3 .
?x0 ns:film.film.written_by M4 .
?x0 ns:film.film.written_by M5 .
?x0 ns:film.film.written_by M6
}