SQL
AخA
select p1.page_id, p1.page_title
from page p1
join (select p.page_title
from categorylinks c
join page p on c.cl_from = p.page_id
where c.cl_to like "Wikipedia_pages_about_contentious_topics") t1
on t1.page_title = p1.page_title
where p1.page_namespace = 0
#limit 100
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