Was a actor whose employer acquired M2 and M3 , was acquired by M0 , and was acquired by M1 M4
SELECT count(*) WHERE {
?x0 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company M0 .
?x0 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company M1 .
?x0 ns:organization.organization.companies_acquired/ns:business.acquisition.company_acquired M2 .
?x0 ns:organization.organization.companies_acquired/ns:business.acquisition.company_acquired M3 .
M4 a ns:film.actor .
M4 ns:people.person.employment_history/ns:business.employment_tenure.company ?x0
}