| in the identified prior art reference | 4 | other |
| from some provinces | 2 | location |
| resource → be → absent | 16 |
| resource → be → missing | 11 |
| negative | neutral | positive |
| 0.408 | 0.526 | 0.066 |
| Raw frequency | 27 |
| Normalized frequency | 0.299 |
| Modifier score | 0.500 |
| Perplexity | 195.320 |