<https://www.campaigninnovation.com/post/\uAD6D\uB0B4-\uD55C\uAD6D\uC5D0\uC11C-\uC77C\uD558\uB294-\uC6B0\uB9AC-\uC544\uBE60>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.campaigninnovation.com/post/%EA%B5%AD%EB%82%B4-%ED%95%9C%EA%B5%AD%EC%97%90%EC%84%9C-%EC%9D%BC%ED%95%98%EB%8A%94-%EC%9A%B0%EB%A6%AC-%EC%95%84%EB%B9%A0>