| Typicality: | 0.419 |
| Saliency: | 0.373 |
| very | 7 | degree |
| obviously | 4 | degree |
| for a number of important applications | 3 | purpose |
| requirement → be difficult to → meet | 23 |
| requirement → be difficult to → satisfy | 9 |
| requirement → be difficult to → achieve | 6 |
| requirement → be difficult to → fulfill | 3 |
| requirement → be difficult to → fulfil | 3 |
| requirement → be hard to → meet | 3 |
| negative | neutral | positive |
| 0.593 | 0.345 | 0.062 |
| Raw frequency | 47 |
| Normalized frequency | 0.373 |
| Modifier score | 0.800 |
| Perplexity | 42.083 |