question: Which company was founded by M1 , M2 , and M3 , founded by M4 and M5 , and founded by M6 's founder
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:business.employer .
  ?x0 ns:organization.organization.founders ?x1 .
  ?x0 ns:organization.organization.founders M1 .
  ?x0 ns:organization.organization.founders M2 .
  ?x0 ns:organization.organization.founders M3 .
  ?x0 ns:organization.organization.founders M4 .
  ?x0 ns:organization.organization.founders M5 .
  ?x1 ns:organization.organization_founder.organizations_founded M6
  }