| deeply | 7 | degree |
| during the late 1990s | 5 | temporal |
| extensively | 2 | degree |
| country → be → studied | 64 |
| country → be → study | 11 |
| country → have → study | 5 |
| negative | neutral | positive |
| 0.163 | 0.660 | 0.177 |
| Raw frequency | 80 |
| Normalized frequency | 0.445 |
| Modifier score | 0.944 |
| Perplexity | 282.200 |