| during the past 50 years | 4 | temporal |
| about operetta | 4 | other |
| database → contain → document | 19 |
| database → be → document | 5 |
| database → constitute → document | 3 |
| negative | neutral | positive |
| 0.096 | 0.800 | 0.104 |
| Raw frequency | 27 |
| Normalized frequency | 0.354 |
| Modifier score | 0.500 |
| Perplexity | 395.057 |