| before yield | 6 | other |
| for fishing | 5 | purpose |
| for breeding and migrating waterbirds | 2 | transitive-object |
| reservoir → be → great | 10 |
| reservoir → be → good | 5 |
| reservoir → be → excellent | 3 |
| negative | neutral | positive |
| 0.044 | 0.235 | 0.721 |
| Raw frequency | 18 |
| Normalized frequency | 0.399 |
| Modifier score | 0.700 |
| Perplexity | 302.515 |