| Typicality: | 0.462 |
| Saliency: | 0.498 |
| in animal and plant respiration | 14 | transitive-object |
| in climate change | 8 | location |
| in photosynthesis | 4 | location |
| carbon dioxide → play → major role | 6 |
| carbon dioxide → play → important role | 6 |
| carbon dioxide → play → significant role | 5 |
| carbon dioxide → play → critical role | 5 |
| carbon dioxide → play → vital role | 3 |
| carbon dioxide → have → important role | 3 |
| carbon dioxide → play → large role | 3 |
| carbon dioxide → have → pivotal role | 3 |
| carbon dioxide → play → essential role | 3 |
| negative | neutral | positive |
| 0.159 | 0.650 | 0.191 |
| Raw frequency | 37 |
| Normalized frequency | 0.498 |
| Modifier score | 0.500 |
| Perplexity | 21.708 |