| a heater | 3 | other |
| to help prevent ammonia poisoning | 2 | purpose |
| really | 2 | degree |
| tank → have → filter | 21 |
| tank → come with → filter | 9 |
| tank → need → filter | 5 |
| tank → be → filter | 3 |
| tank → be equipped with → filter | 3 |
| negative | neutral | positive |
| 0.107 | 0.678 | 0.214 |
| Raw frequency | 41 |
| Normalized frequency | 0.420 |
| Modifier score | 0.980 |
| Perplexity | 155.791 |