| over the past four decades | 5 | temporal |
| in western africa | 4 | location |
| drought → be → prolonged | 12 |
| drought → become → prolonged | 7 |
| negative | neutral | positive |
| 0.543 | 0.417 | 0.040 |
| Raw frequency | 19 |
| Normalized frequency | 0.443 |
| Modifier score | 0.500 |
| Perplexity | 114.007 |