Tell me an arithmetic calendar that has the word calendar in it's name.
SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q669102 . ?sbj rdfs:label ?sbj_label . FILTER(CONTAINS(lcase(?sbj_label), 'calendar')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
arithmetic calendar: Q669102