question: Did M1 employ M2 , M3 , and M4 , employ M5 , M6 , and M7 , and employ a person
query: SELECT count(*) WHERE {
  ?x0 a ns:people.person .
  M1 ns:business.employer.employees/ns:business.employment_tenure.person ?x0 .
  M1 ns:business.employer.employees/ns:business.employment_tenure.person M2 .
  M1 ns:business.employer.employees/ns:business.employment_tenure.person M3 .
  M1 ns:business.employer.employees/ns:business.employment_tenure.person M4 .
  M1 ns:business.employer.employees/ns:business.employment_tenure.person M5 .
  M1 ns:business.employer.employees/ns:business.employment_tenure.person M6 .
  M1 ns:business.employer.employees/ns:business.employment_tenure.person M7
  }