| in order to prove its safety | 4 | purpose |
| thoroughly | 3 | manner |
| for over 2 hours | 3 | temporal |
| fan → be → tested | 49 |
| fan → be used for → this test | 3 |
| negative | neutral | positive |
| 0.100 | 0.726 | 0.174 |
| Raw frequency | 52 |
| Normalized frequency | 0.469 |
| Modifier score | 0.950 |
| Perplexity | 166.637 |