| always | 4 | degree |
| within double integrity tanks | 4 | location |
| next to the shower | 4 | location |
| propane → be → stored | 31 |
| propane → be stored on → site | 6 |
| propane → be stored → onsite | 4 |
| negative | neutral | positive |
| 0.144 | 0.689 | 0.166 |
| Raw frequency | 41 |
| Normalized frequency | 0.748 |
| Modifier score | 0.867 |
| Perplexity | 223.514 |