question: Was a person whose employer employed M1 , M2 , M3 , M4 , and M5 and was founded by M0 M6
query: SELECT count(*) WHERE {
  ?x0 ns:business.employer.employees/ns:business.employment_tenure.person M1 .
  ?x0 ns:business.employer.employees/ns:business.employment_tenure.person M2 .
  ?x0 ns:business.employer.employees/ns:business.employment_tenure.person M3 .
  ?x0 ns:business.employer.employees/ns:business.employment_tenure.person M4 .
  ?x0 ns:business.employer.employees/ns:business.employment_tenure.person M5 .
  ?x0 ns:organization.organization.founders M0 .
  M6 a ns:people.person .
  M6 ns:people.person.employment_history/ns:business.employment_tenure.company ?x0
  }