<https://yasul19.com/bbs/board.php?bo_table=yasul&wr_id=11189&sca=%EB%84%A4%ED%86%A0%EB%9D%BC%EB%A0%88&page=7>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://yasul19.com/bbs/board.php?bo_table=yasul&wr_id=11189&sca=%EB%84%A4%ED%86%A0%EB%9D%BC%EB%A0%88&page=7>