What key details about yun seon-do can be extracted from the following bio? Bio: yun seondo -lrb- hangul : , 1587 -- 1671 -rrb- was a noted korean neo-confucian scholar and writer , poet , politicians of the joseon dynasty . nickname was gosan and hae-ong .
A:
- mrho is kosan '' also '' hae-ong- hangulho is '' also '' - rrja is yag-i- hanjaho is '' also '' - hangulja is - mrja is yag-i- hanjaja is - rrho is gosan '' also '' hae-ong- hangul is - mr is yun son-do- rr is yun seon-do- hanja is