<https://jp.pinterest.com/pirokin730mt/%E3%82%B9%E3%82%A4%E3%83%BC%E3%83%84/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://jp.pinterest.com/pirokin730mt/%E3%82%B9%E3%82%A4%E3%83%BC%E3%83%84/>