| very | 3 | degree |
| for a billion of years | 2 | temporal |
| moon → have → volcano | 8 |
| moon → have → active volcanoes | 7 |
| moon → have → volcanic activity | 3 |
| moon → be → volcanic | 3 |
| negative | neutral | positive |
| 0.111 | 0.739 | 0.150 |
| Raw frequency | 21 |
| Normalized frequency | 0.283 |
| Modifier score | 0.500 |
| Perplexity | 154.180 |