| last year | 5 | temporal |
| in 2015 | 5 | temporal |
| in combination with other drugs | 4 | other |
| death → be related to → heroin | 58 |
| death → be caused by → heroin | 58 |
| death → be attributed to → heroin | 14 |
| death → be linked to → heroin | 12 |
| death → be associated with → heroin | 5 |
| negative | neutral | positive |
| 0.746 | 0.231 | 0.023 |
| Raw frequency | 147 |
| Normalized frequency | 0.640 |
| Modifier score | 0.863 |
| Perplexity | 82.189 |