誰が投票を閉じたのですか?

Data Explorer を使用している場合は、こちら(SQL)をお試しください

SELECT 
    pr.created_at AS "閉鎖日時",
    p.topic_id AS "トピック ID",
    p.post_number AS "投稿番号",
    u.username AS "閉鎖者",
    pr.modifications AS "変更内容"
FROM post_revisions pr
JOIN posts p ON p.id = pr.post_id
JOIN users u ON u.id = pr.user_id
WHERE pr.modifications LIKE '%status=closed%'
ORDER BY pr.created_at DESC