| at producing oxygen | 5 | other |
| amazingly | 5 | degree |
| in removing and gasifying the selenium | 3 | other |
| algae → be → efficient | 9 |
| algae → be → more efficient | 3 |
| negative | neutral | positive |
| 0.055 | 0.220 | 0.726 |
| Raw frequency | 12 |
| Normalized frequency | 0.342 |
| Modifier score | 0.500 |
| Perplexity | 301.213 |