Were M3 , M4 , and M5 executive produced by M0 's American employee and written by a sibling of M2
SELECT count(*) WHERE {
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M0 .
?x0 ns:people.person.nationality ns:m.09c7w0 .
?x1 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 M2 .
FILTER ( ?x1 != M2 ) .
M3 ns:film.film.executive_produced_by ?x0 .
M3 ns:film.film.written_by ?x1 .
M4 ns:film.film.executive_produced_by ?x0 .
M4 ns:film.film.written_by ?x1 .
M5 ns:film.film.executive_produced_by ?x0 .
M5 ns:film.film.written_by ?x1
}