Property talk:P98

Usage instructions (from LI): If there is a date range listed, e.g. in an exhibition catalogue or on an event program, which appears to refer to the actual dates of the events, as opposed to the publication date of the document, do the following: Go to the page for the event in Wikibase, add the start and end date as "start of covered period" and "end of covered period." You can add the document as a reference for this.