Generate a question which can yield the answer mentioned in the input. Generated question must be answered by the answer provided in input, without using any extra knowledge.

Context : Gongyang of Goryeo (9 March 1345 - 17 May 1394, r. 1389 -- 1392) was the 34th and final ruler of the Goryeo dynasty of Korea.
Answer : 17 May 1394
When did the life of Gongyang of Goryeo end?