| a year earlier | 4 | temporal |
| in an enclosed unit | 3 | location |
| before doing surgery | 2 | temporal |
| patient → have → mri | 12 |
| patient → undergo → mri | 11 |
| patient → get → mri | 7 |
| patient → receive → mri | 4 |
| negative | neutral | positive |
| 0.234 | 0.705 | 0.061 |
| Raw frequency | 34 |
| Normalized frequency | 0.426 |
| Modifier score | 0.633 |
| Perplexity | 123.351 |