| Typicality: | 0.358 |
| Saliency: | 0.457 |
| into the 1970s | 7 | temporal |
| pollution → be → significant | 9 |
| pollution → be → significant problem | 4 |
| pollution → be among → significant problems | 3 |
| negative | neutral | positive |
| 0.791 | 0.194 | 0.015 |
| Raw frequency | 16 |
| Normalized frequency | 0.457 |
| Modifier score | 0.500 |
| Perplexity | 258.823 |