Question: Isidorus led a revolt during the reign of an emperor who was the last of a group known as the what?
Sentence (from "Jianwen Emperor"): The era name of his reign, "Jianwen", means "establishing civility" and represented a sharp change in tone from "Hongwu" ("vastly martial"), the era name of the reign of his grandfather and predecessor, the Hongwu Emperor.
Relevant evidence: No