Question: What is the date of birth of Học Phi Nguyễn Thị Hương's husband?
Sentence (from "Học phi Nguyễn Thị Hương"): Concubine of Learnedness) was a wife of Emperor Tự Đức of the Nguyễn Dynasty of Vietnam and adoptive mother of Emperor Kiến Phúc.
Relevant evidence: Yes