SAHEL
| Date | Clue |
|---|---|
| 2014-11-13 | Semiarid region of Africa |
| 2012-10-14 | African region including Khartoum and Timbuktu |
| 2009-04-03 | Savanna region stretching from Senegal to Chad |
| Date | Clue |
|---|---|
| 2014-11-13 | Semiarid region of Africa |
| 2012-10-14 | African region including Khartoum and Timbuktu |
| 2009-04-03 | Savanna region stretching from Senegal to Chad |