Were M2 and M3 written by M1 's sibling and executive produced by a film producer 's founder and employee
SELECT count(*) WHERE {
?x0 ns:organization.organization_founder.organizations_founded ?x1 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company ?x1 .
?x1 a ns:film.producer .
?x2 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 M1 .
FILTER ( ?x2 != M1 ) .
M2 ns:film.film.executive_produced_by ?x0 .
M2 ns:film.film.written_by ?x2 .
M3 ns:film.film.executive_produced_by ?x0 .
M3 ns:film.film.written_by ?x2
}