instruction: Closing users who 'know' about a tag.
response: SELECT DISTINCT Users.Id AS "user_link", Users.DisplayName FROM (((SELECT OwnerUserId, ParentId, Score FROM (Posts JOIN PostTypes ON Posts.PostTypeId = PostTypes.Id) WHERE PostTypes.Name = 'Answer') AS a JOIN (SELECT Posts.Id, Tags, Score FROM (Posts JOIN PostTypes ON Posts.PostTypeId = PostTypes.Id) WHERE PostTypes.Name = 'Question') AS q ON a.ParentId = q.Id) JOIN Users ON a.OwnerUserId = Users.Id) WHERE Users.Reputation > 3000 AND q.Tags LIKE '%' + @tagName + '%' AND a.Score > 1 ORDER BY Users.DisplayName