URL: https://o.quizlet.com/PQHw.W-fU6jwlPzAWRWN6Q_b.png
URL2: https://quizlet.com/373274174/%EC%A4%91%EC%A0%88%EC%88%98%EC%88%A0-%ED%95%84%EC%9A%94%EC%97%86%EB%8A%94-%EB%AF%B8%ED%94%84%EC%A7%84-%EA%B5%AC%EB%A7%A4-%EB%8C%80%ED%96%89-%ED%95%98%EB%8A%94%EA%B3%B3-talk-helpmife-diagram/
