| according to the epa | 6 | other |
| to smoking cigarettes | 2 | purpose |
| radon → be → second | 18 |
| radon → be → close second | 4 |
| radon → come in → second | 3 |
| negative | neutral | positive |
| 0.802 | 0.181 | 0.017 |
| Raw frequency | 25 |
| Normalized frequency | 0.425 |
| Modifier score | 0.500 |
| Perplexity | 367.533 |