Question: Which country Thuận Thiên (Trần Dynasty Empress)'s mother is from?
Sentence (from "Trần Thị Dung"): During the troubled times of the Early Trần Dynasty with the revolt of Trần Liễu, son-in-law of Trần Thị Dung, and the first Mongol invasion of Đại Việt, she had a significant role in the reconciliation between Trần Thái Tông and his brother Trần Liễu, Lady Linh Từ also had many activities to help the royal family during the Mongol invasion.
Relevant evidence: No