The new Elastic Search backend, Cirrus, has been enabled on test.wikidata.org
Please try it out, give feedback and report bugs!
https://bugzilla.wikimedia.org/enter_bug.cgi?product=MediaWiki%20extensions&...
Cirrus currently sorts results by number of incoming links from within the wiki. You can try searching for "Athens" as an example.
Cheers, Katie
wikidata-tech@lists.wikimedia.org