question: Was M0 a American person that M3 was founded by , M4 was founded by , and M2 employed
query: SELECT count(*) WHERE {
  M0 a ns:people.person .
  M0 ns:organization.organization_founder.organizations_founded M3 .
  M0 ns:organization.organization_founder.organizations_founded M4 .
  M0 ns:people.person.employment_history/ns:business.employment_tenure.company M2 .
  M0 ns:people.person.nationality ns:m.09c7w0
  }