question: Was M0 employed by M1 , M2 , M3 , and M4 , employed by M5 , and employed by M6 and M7
query: SELECT count(*) WHERE {
  M0 ns:people.person.employment_history/ns:business.employment_tenure.company M1 .
  M0 ns:people.person.employment_history/ns:business.employment_tenure.company M2 .
  M0 ns:people.person.employment_history/ns:business.employment_tenure.company M3 .
  M0 ns:people.person.employment_history/ns:business.employment_tenure.company M4 .
  M0 ns:people.person.employment_history/ns:business.employment_tenure.company M5 .
  M0 ns:people.person.employment_history/ns:business.employment_tenure.company M6 .
  M0 ns:people.person.employment_history/ns:business.employment_tenure.company M7
  }