What is the concept developed by Niklas Luhman and which has the word "society" in their name?
SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:/instance of/ wd:/concept/ . ?sbj wdt:/significant person/ wd:/Niklas Luhmann/ . ?sbj rdfs:label ?sbj_label . FILTER(CONTAINS(lcase(?sbj_label), 'society')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 