| in purifying the atmosphere | 4 | location |
| on animal life | 4 | transitive-object |
| smoke → have → effect | 6 |
| smoke → produce → effect | 5 |
| smoke → have → significant effect | 3 |
| negative | neutral | positive |
| 0.292 | 0.544 | 0.164 |
| Raw frequency | 14 |
| Normalized frequency | 0.282 |
| Modifier score | 0.500 |
| Perplexity | 149.212 |