| Typicality: | 0.547 |
| Saliency: | 0.316 |
| to conduct an exciting mission | 4 | purpose |
| spacecraft → use → ion propulsion | 8 |
| spacecraft → use → ion engines | 3 |
| negative | neutral | positive |
| 0.068 | 0.492 | 0.439 |
| Raw frequency | 11 |
| Normalized frequency | 0.316 |
| Modifier score | 1.000 |
| Perplexity | 372.994 |