<https://www.nicovideo.jp/watch/sm23588895>
<http://schema.org/uploadDate>
"2014-05-20T01:15:13+09:00"^^<http://schema.org/Date>
<https://www.nicovideo.jp/tag/%E3%81%BF%E3%81%8D%E3%81%BD%E3%81%A3%E3%81%BD>