| possibly | 4 | other |
| on rare occasions | 4 | temporal |
| because of a tear of some sort | 3 | cause |
| knee → require → surgery | 23 |
| knee → need → surgery | 7 |
| knee → have → surgery | 3 |
| negative | neutral | positive |
| 0.649 | 0.299 | 0.052 |
| Raw frequency | 33 |
| Normalized frequency | 0.418 |
| Modifier score | 0.600 |
| Perplexity | 149.194 |