https://itmanual.net/%ec%b4%88%ea%b1%b0%eb%8c%80-ai%eb%9e%80-2-gpt-3-%ed%95%9c%ea%b3%84%ec%a0%90%ea%b3%bc-%ec%b4%88%ea%b1%b0%eb%8c%80-ai-%ed%95%a8%ec%a0%95/