context: Cao Zhan (), nicknamed Menzhuan (), wrote under the pseudonym Cao Xueqin [1] () - the alleged author of the first 80 chapters of the classic Chinese novel "A Dream in a Red Tower". There is no exact information about his life dates: some sources say that he was born in 1715 [2], others indicate 1724 [3]. The year of death is considered 1763 [2] or 1764 year [4].
question: When did Cao Xueqin die?
answers.text: 1763 [2] or 1764