British voters opted out of the European Union in last year's historic referendum, but Brexit can't actually get underway until Article 50 of the Lisbon Treaty is triggered.
원문출처 : http://www.cnn.com/2017/01/24/europe/article-50-what-is-it/index.html
원문출처 : http://www.cnn.com/2017/01/24/europe/article-50-what-is-it/index.html