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