| very | 11 | degree |
| in heating an area | 7 | location |
| without a fan | 3 | other |
| fireplace → be → efficient | 51 |
| fireplace → be → more efficient | 10 |
| fireplace → be → effective | 3 |
| negative | neutral | positive |
| 0.078 | 0.281 | 0.641 |
| Raw frequency | 64 |
| Normalized frequency | 0.707 |
| Modifier score | 0.475 |
| Perplexity | 349.863 |