In T306883: [L] Searchers see thumbnails next to search results on the special:search page, a thumbnail is introduced in each search result pages. In the search result such as https://www.wikidata.org/w/index.php?fulltext=1&search=test&title=Special%3ASearch&ns0=1&ns120=1 there are a number of items without images. Currently a general placeholder is shown. We can show a more specific placeholder based on its P31 value. (A future improvement is to find a placeholder through a P279 chain).