question: Did M4 and M6 acquire a employer of M0 , M1 , M2 , and M3 and acquire M5
query: SELECT count(*) WHERE {
  ?x0 ns:business.employer.employees/ns:business.employment_tenure.person M0 .
  ?x0 ns:business.employer.employees/ns:business.employment_tenure.person M1 .
  ?x0 ns:business.employer.employees/ns:business.employment_tenure.person M2 .
  ?x0 ns:business.employer.employees/ns:business.employment_tenure.person M3 .
  M4 ns:organization.organization.companies_acquired/ns:business.acquisition.company_acquired ?x0 .
  M4 ns:organization.organization.companies_acquired/ns:business.acquisition.company_acquired M5 .
  M6 ns:organization.organization.companies_acquired/ns:business.acquisition.company_acquired ?x0 .
  M6 ns:organization.organization.companies_acquired/ns:business.acquisition.company_acquired M5
  }