USE dewiki_p;

select 

    actor_name,

    rc_timestamp as CreationTime, 

    rc_title as Title, 

    rc_comment.comment_text

from recentchanges 

inner join comment as rc_comment on rc_comment_id = rc_comment.comment_id

inner join actor on actor_id = rc_actor

where 

    rc_new = 0

    and rc_namespace = 0 

    and rc_comment.comment_text like '%wf%' 

    and actor_name<>'Martin Sg.'

    and actor_name<>'JFH-52'

order by rc_timestamp desc;