Were M3 and M4 founded by a female person 's sibling 's spouse and founded by M2 's producer
SELECT count(*) WHERE {
?x0 ns:people.person.spouse_s/ns:people.marriage.spouse|ns:fictional_universe.fictional_character.married_to/ns:fictional_universe.marriage_of_fictional_characters.spouses ?x1 .
?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 ?x2 .
?x2 a ns:people.person .
?x2 ns:people.person.gender ns:m.02zsn .
?x3 ns:film.producer.film|ns:film.production_company.films M2 .
FILTER ( ?x0 != ?x1 ) .
FILTER ( ?x1 != ?x2 ) .
M3 ns:organization.organization.founders ?x0 .
M3 ns:organization.organization.founders ?x3 .
M4 ns:organization.organization.founders ?x0 .
M4 ns:organization.organization.founders ?x3
}