| naturally | 6 | manner |
| according to the chemical structure | 2 | other |
| caffeine → be → alkaloid | 57 |
| caffeine → be → a plant alkaloid | 6 |
| caffeine → be → natural alkaloid | 6 |
| caffeine → be → occurring alkaloid | 4 |
| caffeine → be → an alkaloid compound | 4 |
| negative | neutral | positive |
| 0.237 | 0.678 | 0.085 |
| Raw frequency | 77 |
| Normalized frequency | 0.540 |
| Modifier score | 0.500 |
| Perplexity | 11.666 |