Task: Translation
Input (English): He graduated from the Galatasaray High School in Shumen in 1858 and became a teacher in Istanbul , where he remained until 1864 .
Output (Chinese): 1858年，他毕业于舒曼的加拉塔萨雷学校，并在伊斯坦布尔成为一名教师，直到1864年。