| in shallow areas | 5 | location |
| a few decades ago | 4 | temporal |
| lake → be → murky | 29 |
| lake → have → murky water | 3 |
| lake → become → murky | 3 |
| negative | neutral | positive |
| 0.402 | 0.472 | 0.126 |
| Raw frequency | 35 |
| Normalized frequency | 0.444 |
| Modifier score | 0.725 |
| Perplexity | 343.189 |