| naturally | 9 | manner |
| melatonin → be found in → food | 8 |
| melatonin → be found in → certain foods | 4 |
| melatonin → occur in → food | 3 |
| negative | neutral | positive |
| 0.104 | 0.715 | 0.181 |
| Raw frequency | 15 |
| Normalized frequency | 0.280 |
| Modifier score | 0.500 |
| Perplexity | 14.037 |