| in part | 9 | other |
| to be challenging | 7 | degree |
| usually | 6 | degree |
| article → be → possible | 65 |
| article → be made → possible | 34 |
| article → be → achievable | 6 |
| article → be → feasible | 6 |
| negative | neutral | positive |
| 0.092 | 0.547 | 0.361 |
| Raw frequency | 111 |
| Normalized frequency | 0.485 |
| Modifier score | 0.867 |
| Perplexity | 160.804 |