| for comfort and size adjustment | 2 | purpose |
| helmet → have → liner | 9 |
| helmet → come with → internal liner | 8 |
| helmet → feature → internal liner | 4 |
| negative | neutral | positive |
| 0.044 | 0.748 | 0.208 |
| Raw frequency | 21 |
| Normalized frequency | 0.380 |
| Modifier score | 0.675 |
| Perplexity | 280.425 |