rdfs:member
http://hosi.org/ts/When/BasicTypes/M17n
乾元
ts:dbpedia
http://ja.dbpedia.org/resource/乾元_(日本)
ts:label
乾元
ts:reference
https://ja.wikipedia.org/wiki/%E4%B9%BE%E5%85%83_%28%E6%97%A5%E6%9C%AC%29