1. Africa
   1. South Africa
   2. Congo
   3. Egypt
2. Europe
   1. Great Britain
   2. France
3. Asia
4. Antarctica
5. South America
6. North America
   1. United States
      1. Massachussets
      2. New York
      3. New Jersey
      4. Maine
      5. Iowa
      6. California
      7. Washington
      8. Subtopic 8
   2. Canada
      1. PEI
      2. Newfoundland
      3. New Brunswick
      4. Quebec
      5. Ontario
      6. Manitoba
      7. Saskatchewan
      8. Alberta
      9. BC
      10. Nunavut
      11. NWT
      12. Yukon
   3. Mexico