Property talk pages (wgNamespaceNumber: 121) at Wikidata sometimes include subpages with archives, chart, lists, etc.
It could be easier to navigate these if the link to the parent page was there, as on project namespace.
Community talk: https://www.wikidata.org/wiki/Wikidata:Project_chat/Archive/2016/09#Backlink_on_Property_talk_subpages.3F