| from four-limbed ancestors | 5 | other |
| from an amphibious ancestor | 4 | other |
| from amphibians | 3 | other |
| reptile → be → descended | 12 |
| negative | neutral | positive |
| 0.263 | 0.706 | 0.030 |
| Raw frequency | 12 |
| Normalized frequency | 0.378 |
| Modifier score | 0.500 |
| Perplexity | 238.436 |