SharePoint Online provides publishing "SharePoint News" in modern sites. If you use SharePoint Hybrid Search you can find content from SPO on premise and vise versa.
I would like to provide a Display Template on premise for news posted in SharePoint Online. "SharePoint News" are just modern pages that have been published as News. So you can find them when searching for
contentClass:STS_ListItem_WebPageLibrary as every other web page.
What property marks a web page as published as SharePoint News? Got the "SharePoint 2013 search query tool 2.2" but I cannot find any property that makes me recognize news at all.