| by liquefied natural gas | 4 | other |
| by driving two shafts | 3 | manner |
| fully | 2 | degree |
| ship → be → powered | 25 |
| ship → be powered at → sea | 3 |
| negative | neutral | positive |
| 0.101 | 0.676 | 0.223 |
| Raw frequency | 28 |
| Normalized frequency | 0.352 |
| Modifier score | 0.933 |
| Perplexity | 341.912 |