rdfs:member
http://hosi.org/ts/When/BasicTypes/M17n
建徳
ts:dbpedia
http://ja.dbpedia.org/resource/建徳_(北周)
ts:label
建徳
ts:reference
https://ja.wikipedia.org/wiki/%E5%BB%BA%E5%BE%B3_%28%E5%8C%97%E5%91%A8%29