Were M2 , M5 , and M6 executive produced by M3 and M4 and directed by a film producer whose sibling wrote M1
SELECT count(*) WHERE {
?x0 a ns:film.producer .
?x0 ns:people.person.sibling_s/ns:people.sibling_relationship.sibling|ns:fictional_universe.fictional_character.siblings/ns:fictional_universe.sibling_relationship_of_fictional_characters.siblings ?x1 .
?x1 ns:film.writer.film M1 .
FILTER ( ?x0 != ?x1 ) .
M2 ns:film.film.directed_by ?x0 .
M2 ns:film.film.executive_produced_by M3 .
M2 ns:film.film.executive_produced_by M4 .
M5 ns:film.film.directed_by ?x0 .
M5 ns:film.film.executive_produced_by M3 .
M5 ns:film.film.executive_produced_by M4 .
M6 ns:film.film.directed_by ?x0 .
M6 ns:film.film.executive_produced_by M3 .
M6 ns:film.film.executive_produced_by M4
}