| operatic character | Q50386450 |
| fictional human | Q15632617 |
| P172 | ethnic group | African Americans | Q49085 |
| P735 | given name | Ulrica | Q4964647 |
| Ulrica | Q4964647 | ||
| P1441 | present in work | Un ballo in maschera | Q221757 |
| P21 | sex or gender | female | Q6581072 |
| P412 | voice type | contralto | Q37137 |
| Q19947754 | Ebe Treves | subject has role | P2868 |
| Q221757 | Un ballo in maschera | characters | P674 |
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