Barack Obama made a surprise appearance at Michelle Obama's book tour in Washington, tossing in a reference to Jay-Z at a Beyonce concert.
원문출처 : https://www.cnn.com/2018/11/18/politics/obama-michelle-book-tour-jay-z/index.html
원문출처 : https://www.cnn.com/2018/11/18/politics/obama-michelle-book-tour-jay-z/index.html