question: What company whose employee founded M3 and was employed by M2 was acquired by and acquired M1
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:business.employer .
  ?x0 ns:business.employer.employees/ns:business.employment_tenure.person ?x1 .
  ?x0 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company M1 .
  ?x0 ns:organization.organization.companies_acquired/ns:business.acquisition.company_acquired M1 .
  ?x1 ns:organization.organization_founder.organizations_founded M3 .
  ?x1 ns:people.person.employment_history/ns:business.employment_tenure.company M2
  }