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