question: Was M2 acquired by a company , acquired by M3 , acquired by M4 , and acquired by a parent of M0
query: SELECT count(*) WHERE {
  ?x0 ns:people.person.children|ns:fictional_universe.fictional_character.children|ns:organization.organization.child/ns:organization.organization_relationship.child M0 .
  ?x1 a ns:business.employer .
  M2 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company ?x0 .
  M2 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company ?x1 .
  M2 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company M3 .
  M2 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company M4
  }