Question: who is yi seong gye?
Answer: Taejo of Joseon (October 27, 1335 – May 24, 1408), born 李成桂 (Middle Korean: *Ni Syeng kyey(*니셩계), Modern Korean: Yi Seong-gye(이성계)) was the founder and the first king of the Joseon dynasty of Korea. ... Abdicated in 1398 during a strife between his sons, he died in 1408.