| Typicality: | 0.315 |
| Saliency: | 0.153 |
| most often | 3 | temporal |
| ultrasound → be performed → between 20 and 22 weeks | 3 |
| ultrasound → be performed at → week | 3 |
| negative | neutral | positive |
| 0.051 | 0.856 | 0.093 |
| Raw frequency | 6 |
| Normalized frequency | 0.153 |
| Modifier score | 0.500 |
| Perplexity | 59.736 |