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SELECT q.Id, a.Id FROM Posts p INNER JOIN Users AS q ON p.OwnerUserId = q.Id INNER JOIN Posts AS answers ON p.AcceptedAnswerId = answers.Id INNER JOIN Users AS a ON answers.OwnerUserId = a.Id WHERE q.CreationDate > DATEADD(month, -1, GETDATE()) AND a.CreationDate > DATEADD(month, -1, GETDATE()) AND p.OwnerUserId != answers.OwnerUserId AND p.OwnerUserId IS NOT NULL AND answers.OwnerUserId IS NOT NULL GROUP BY q.Id, a.Id HAVING COUNT(*) > 1