| from the comet | 5 | location |
| from the gas | 4 | other |
| from the catabolism of dietary proteins | 3 | other |
| ammonia → be → derived | 5 |
| ammonia → be → obtained | 5 |
| ammonia → be → extracted | 4 |
| negative | neutral | positive |
| 0.247 | 0.705 | 0.048 |
| Raw frequency | 14 |
| Normalized frequency | 0.346 |
| Modifier score | 0.500 |
| Perplexity | 63.519 |