question: Was M0 a Chinese employee of M1 , M2 , M3 , and M4
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.nationality ns:m.0d05w3
  }