Question: What nationality is Nguyễn Quang Toản's father?
Sentence (from "Nguyễn Huệ"): Nguyễn Huệ and his brothers, Nguyễn Nhạc and Nguyễn Lữ, together known as the Tây Sơn brothers, were the leaders of the Tây Sơn rebellion.
Relevant evidence: No