Please answer the following question: Facts: - rrborn: yangseong '' or '' tang - mrborn: yangsong '' or '' tang - hanjaborn: '' or '' - hangul: , -lrb- -rrb- - mr: p -rrb- - wang ' yongwon-wang , p ' yonggang -lrb- sangho - rr: pyeongwon-wang , pyeonggang -lrb- sangho -rrb- - wang - hangulborn: '' or '' - hanja: , -lrb- -rrb- Based on these bullet points, write a short biography describing the life of pyeongwon of goguryeo .
A:
king pyeongwon of goguryeo -lrb- ruled 559 -- 590 -rrb- was a 6th-century korean monarch , the 25th ruler of goguryeo , the northernmost of the three kingdoms of korea .king pyeongwon was also known as king p'yonggang sangho .his surname was yangseong -lrb- though the suishu and tangshu have him as tangseong -rrb- .