Did a actor that was employed by M2 and founded M3 write M1
SELECT count(*) WHERE {
?x0 a ns:film.actor .
?x0 ns:film.writer.film M1 .
?x0 ns:organization.organization_founder.organizations_founded M3 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M2
}