| for an unknown reason | 5 | cause |
| overnight | 4 | temporal |
| suddenly | 3 | manner |
| river → turn → red | 25 |
| river → turned → red | 7 |
| river → turn → blood red | 6 |
| negative | neutral | positive |
| 0.449 | 0.451 | 0.100 |
| Raw frequency | 38 |
| Normalized frequency | 0.440 |
| Modifier score | 0.500 |
| Perplexity | 165.206 |