| for happen at this level | 10 | purpose |
| to their success | 5 | other |
| to the cities‘ distinctive identities | 4 | transitive-object |
| building → be → key | 31 |
| building → be → the key | 8 |
| negative | neutral | positive |
| 0.059 | 0.391 | 0.550 |
| Raw frequency | 39 |
| Normalized frequency | 0.441 |
| Modifier score | 0.500 |
| Perplexity | 105.690 |