instruction: Select by (one) Tags.
response: SELECT COUNT(Votes.PostId) AS "downvote_count", Votes.PostId AS "post_link" FROM Votes INNER JOIN Posts ON Posts.Id = Votes.PostId WHERE PostTypeId = 1 AND Posts.Tags LIKE '%ruby%' AND VoteTypeId = 3 GROUP BY PostId ORDER BY 'downvote_count' DESC LIMIT 5