What are the national library which start with the letter library
SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q22806 . ?sbj rdfs:label ?sbj_label . FILTER(CONTAINS(lcase(?sbj_label), 'library')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
national library: Q22806