SELECT page_title, MAX(rev_timestamp), GROUP_CONCAT(DISTINCT actor_name SEPARATOR ',') AS Bots

  FROM pagelinks, page LEFT JOIN (revision, actor, user_groups)

                         ON rev_page = page_id

                        AND rev_actor = actor_id

                        AND actor_user = ug_user

                        AND ug_group = 'bot'

                        AND rev_timestamp > '20211201000000'

                        AND actor_name NOT in ('InternetArchiveBot', 'CommonsDelinker', 'Dateientlinkerbot')

 WHERE page_namespace = 0

   AND pl_from = page_id

   AND pl_namespace = 0

   AND pl_title = 'Bundesstaat_(Föderaler_Staat)'

 GROUP by page_id