| currently | 22 | temporal |
| in breeder hens | 20 | location |
| to give broad protection | 15 | purpose |
| vaccine → be → developed | 738 |
| vaccine → be developed for → use | 20 |
| vaccine → be developed for → example | 5 |
| vaccine → be developed → available | 4 |
| vaccine → be developed in → addition | 3 |
| negative | neutral | positive |
| 0.256 | 0.576 | 0.168 |
| Raw frequency | 770 |
| Normalized frequency | 0.755 |
| Modifier score | 0.431 |
| Perplexity | 246.476 |