Google is testing to expand the Candidate Cards 1 for publishers. In March Google also tested the same cards for local businesses 2
" When publishers submit their content, Google is actually hosting this content on its own site, on a posts.google.com URL. The articles are currently limited to 14, 400 words. In addition to the text, up to ten images and/or videos can be included. "
1 http://searchengineland.com/google-introduces-candidate-cards-for-presidential-election-season-241026
2 http://searchengineland.com/googles-candidate-cards-being-tested-for-businesses-243960?
Google Adds New "Instant Content" Feature in Search Results