Did M2 and M3 employ M1 's prequel 's writer and producer and employ M0 's parent
SELECT count(*) WHERE {
?x0 ns:people.person.children|ns:fictional_universe.fictional_character.children|ns:organization.organization.child/ns:organization.organization_relationship.child M0 .
?x1 ns:film.producer.film|ns:film.production_company.films ?x2 .
?x1 ns:film.writer.film ?x2 .
?x2 ns:film.film.sequel M1 .
M2 ns:business.employer.employees/ns:business.employment_tenure.person ?x0 .
M2 ns:business.employer.employees/ns:business.employment_tenure.person ?x1 .
M3 ns:business.employer.employees/ns:business.employment_tenure.person ?x0 .
M3 ns:business.employer.employees/ns:business.employment_tenure.person ?x1
}