Question: When did Nguyễn Quang Toản's father die?
Sentence (from "Nguyễn Quang Thùy"): In January 1802, Thùy attacked Lũy Thầy( a strategic wall built by Đào Duy Từ, in present day Quảng Bình Province), but was defeated by Nguyễn Ánh, and retreated to Nghệ An.
Relevant evidence: No