| in pennsylvania | 9 | location |
| from the federal stud piber | 3 | location |
| occasionally | 2 | degree |
| virus → be found in → horse | 14 |
| virus → be detected in → horse | 3 |
| virus → be identified in → horse | 3 |
| negative | neutral | positive |
| 0.560 | 0.420 | 0.020 |
| Raw frequency | 20 |
| Normalized frequency | 0.338 |
| Modifier score | 0.300 |
| Perplexity | 43.290 |