Did M1 and M4 found M2 , found M3 , and found a actor 's employer
SELECT count(*) WHERE {
?x0 ns:business.employer.employees/ns:business.employment_tenure.person ?x1 .
?x1 a ns:film.actor .
M1 ns:organization.organization_founder.organizations_founded ?x0 .
M1 ns:organization.organization_founder.organizations_founded M2 .
M1 ns:organization.organization_founder.organizations_founded M3 .
M4 ns:organization.organization_founder.organizations_founded ?x0 .
M4 ns:organization.organization_founder.organizations_founded M2 .
M4 ns:organization.organization_founder.organizations_founded M3
}