<https://cbe.korea.ac.kr/wp/%ec%84%b8%eb%af%b8%eb%82%98-%ec%95%88%eb%82%b4/%ec%9e%90%eb%a3%8c%ec%8b%a4/#webpage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://cbe.korea.ac.kr/wp/%EC%84%B8%EB%AF%B8%EB%82%98-%EC%95%88%EB%82%B4/%EC%9E%90%EB%A3%8C%EC%8B%A4/?order_by=fn_pid&order_type=desc&vid=20>