Was M1 a actor that M3 was founded by , M4 was founded by , and a producer of M0 employed
SELECT count(*) WHERE {
?x0 ns:film.producer.film|ns:film.production_company.films M0 .
M1 a ns:film.actor .
M1 ns:organization.organization_founder.organizations_founded M3 .
M1 ns:organization.organization_founder.organizations_founded M4 .
M1 ns:people.person.employment_history/ns:business.employment_tenure.company ?x0
}