問：上下文：斯洛伐克嘅米羅斯拉夫·拉賈克（MiroslavLajčák）被選為2017年9月開始嘅第72屆會議嘅聯合國大會主席。先畀出意識流：
To answer this question, we should know that: Miroslav Lajčák of Slovakia has been elected as the United Nations General Assembly President of its 72nd session beginning in September 2017. Therefore, the final answer is Miroslav Lajčák.