What periodization contains the word "wilhelmine" in its name?
SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q816829 . ?sbj rdfs:label ?sbj_label . FILTER(CONTAINS(lcase(?sbj_label), 'wilhelmine')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
periodization: Q816829