| in a vast region | 7 | location |
| to cities | 6 | transitive-object |
| to support the influx | 3 | purpose |
| drought → cause → migration | 7 |
| drought → lead to → migration | 6 |
| drought → helped spark → new migration | 3 |
| drought → increase → migration | 3 |
| negative | neutral | positive |
| 0.754 | 0.231 | 0.015 |
| Raw frequency | 19 |
| Normalized frequency | 0.443 |
| Modifier score | 0.500 |
| Perplexity | 108.467 |