1991/08/13-1991/08/13
https://w3id.org/zericatalog/date/1991-08-13-1991-08-13 an entity of type: E52_Time-Span
1991-08-13-01-01T00:00:00Z
1991-08-13-01-01T00:00:00Z
1991/08/13-1991/08/13