| in today’s industrial processes | 6 | location |
| to conserve resources | 6 | purpose |
| to pollution control | 4 | purpose |
| catalyst → be → essential | 10 |
| catalyst → be → important | 10 |
| catalyst → be → critical | 5 |
| catalyst → be → vital | 3 |
| negative | neutral | positive |
| 0.030 | 0.560 | 0.410 |
| Raw frequency | 28 |
| Normalized frequency | 0.522 |
| Modifier score | 0.500 |
| Perplexity | 65.207 |