| in the short term | 5 | temporal |
| to cause nose | 4 | purpose |
| in cancer | 3 | other |
| chemical → cause → headache | 79 |
| chemical → be linked to → headache | 15 |
| chemical → lead to → headache | 4 |
| chemical → be associated with → headache | 4 |
| chemical → produce → headache | 4 |
| chemical → trigger → headache | 3 |
| negative | neutral | positive |
| 0.894 | 0.093 | 0.014 |
| Raw frequency | 109 |
| Normalized frequency | 0.598 |
| Modifier score | 0.550 |
| Perplexity | 178.046 |