question: Was M0 a company that was founded by M2 , M3 , and M4 , employed M6 , and was founded by M5
query: SELECT count(*) WHERE {
  M0 a ns:business.employer .
  M0 ns:business.employer.employees/ns:business.employment_tenure.person M6 .
  M0 ns:organization.organization.founders M2 .
  M0 ns:organization.organization.founders M3 .
  M0 ns:organization.organization.founders M4 .
  M0 ns:organization.organization.founders M5
  }