https://blog.gongquiz.com/2023/04/25/%ec%b0%a8%ec%84%b8%eb%8c%80-%ec%9b%b9%ec%9c%bc%eb%a1%9c-%eb%b6%88%eb%a6%ac%eb%8a%94-semantic-web%ec%9d%98-%ed%95%b5%ec%8b%ac-%ea%b8%b0%ec%88%a0%ea%b3%bc-%ea%b0%80%ec%9e%a5-%ea%b1%b0%eb%a6%ac%ea%b0%80/