| at a hospital | 4 | location |
| to an oral surgeon | 4 | transitive-object |
| prior to | 3 | temporal |
| patient → need → surgery | 12 |
| patient → require → surgery | 8 |
| negative | neutral | positive |
| 0.439 | 0.484 | 0.077 |
| Raw frequency | 20 |
| Normalized frequency | 0.365 |
| Modifier score | 0.480 |
| Perplexity | 165.429 |