Question: What is the date of birth of Thuận Thiên (Nguyễn Dynasty Empress)'s husband?
Sentence (from "Thuận Thiên (Nguyễn dynasty empress)"): Empress Thuận Thiên (January 4, 1769 – November 6, 1846), born Trần Thị Đang in Văn Xá village, Hương Trà, Thừa Thiên, was the second wife of Emperor Gia Long of Vietnam and mother of Emperor Minh Mạng.
Relevant evidence: Yes