Which employer of M1 was a company whose parent acquired and was acquired by M2
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:business.employer .
?x0 ns:business.employer.employees/ns:business.employment_tenure.person M1 .
?x0 ns:people.person.parents|ns:fictional_universe.fictional_character.parents|ns:organization.organization.parent/ns:organization.organization_relationship.parent ?x1 .
?x1 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company M2 .
?x1 ns:organization.organization.companies_acquired/ns:business.acquisition.company_acquired M2
}