Complex sentence: However, from the middle of the Ming era, the Chinese government lost control in Tibet, and the Mongols again seized political control, and it was also in this period that Tibet Buddhism won spiritual domination in Mongolia, which continues to this day.
Split into simpler sentences: However, from the middle of the Ming era, the Chinese government lost control in Tibet, and the Mongols again seized political control. In this period Tibetan Buddhism won spiritual domination in Mongolia, which continues to this day.