Question: When did Nguyễn Phúc Miên Bửu's father die?
Sentence (from "Nguyễn Phúc Miên Bửu"): Finally, Tự Đức decided to pardon him, and granted him the title Tương An Quận Vương (襄安郡王, "Provincial Prince of Tương An") in 1878 posthumously.
Relevant evidence: No