| naturally | 11 | manner |
| under the long nights of winter | 2 | temporal |
| melatonin → be found in → animal | 17 |
| melatonin → be found in → the body | 13 |
| melatonin → be found in → human body | 6 |
| melatonin → be found in → the blood | 3 |
| melatonin → be found in → human | 3 |
| negative | neutral | positive |
| 0.062 | 0.767 | 0.171 |
| Raw frequency | 42 |
| Normalized frequency | 0.459 |
| Modifier score | 0.500 |
| Perplexity | 65.253 |