| in keeping london | 4 | location |
| for infectivity | 3 | purpose |
| very | 3 | degree |
| tube → be → important | 12 |
| tube → be → essential | 6 |
| tube → be → critical | 5 |
| negative | neutral | positive |
| 0.089 | 0.668 | 0.244 |
| Raw frequency | 23 |
| Normalized frequency | 0.380 |
| Modifier score | 0.500 |
| Perplexity | 268.533 |