instruction: casperOne's Top Answers by Tags. casperOne's answers aggregated by tag, where
  the number of answers per tag is greater
  than or equal to five.
response: SELECT t.TagName, COUNT(t.Id) AS AnswersForTag FROM Posts AS q INNER JOIN PostTags AS pt ON pt.PostId = q.Id INNER JOIN Tags AS t ON t.Id = pt.TagId INNER JOIN Posts AS a ON a.ParentId = q.Id WHERE a.OwnerUserId = 68172 GROUP BY t.TagName HAVING COUNT(t.Id) >= 5 ORDER BY 2 DESC