instruction: Get the median question score for a tag.
response: SELECT ((SELECT Score FROM (SELECT PERCENT AS Score FROM Posts AS p WHERE p.PostTypeId = 2 AND NOT Score IS NULL ORDER BY Score LIMIT 50) AS A ORDER BY Score DESC LIMIT 1) + (SELECT Score FROM (SELECT PERCENT AS Score FROM Posts AS p WHERE p.PostTypeId = 2 AND NOT Score IS NULL ORDER BY Score DESC LIMIT 50) AS A ORDER BY Score LIMIT 1)) / 2