| from the natural decay of uranium | 17 | cause |
| from soil | 9 | other |
| constantly | 7 | temporal |
| radon → be → produced | 52 |
| radon → be → formed | 28 |
| radon → be → created | 11 |
| radon → be → generated | 6 |
| negative | neutral | positive |
| 0.236 | 0.705 | 0.059 |
| Raw frequency | 97 |
| Normalized frequency | 0.696 |
| Modifier score | 0.500 |
| Perplexity | 114.740 |