SELECT 

    el.el_from AS page_id, 

    COUNT(CONCAT(el.el_to_domain_index, '/', el.el_to_path)) AS reference_count, 

    REPLACE(p.page_title, '_', ' ') AS 'Good article',

    p.page_len AS 'Page length'

FROM externallinks el

JOIN page p ON el.el_from = p.page_id

WHERE p.page_id IN (

    SELECT cl_from 

    FROM categorylinks 

    WHERE cl_to = REPLACE('Good articles', ' ', '_')

)

GROUP BY el.el_from, p.page_title, p.page_len

ORDER BY reference_count DESC

LIMIT 1;