Simplify the following text for a Grade 10 native English-speaking person.
Original: Heo Jeong ( Hangul : í -- ì , Hanja : è æ '' , April 8 1896 - September 18 1988 ) was South Korean Politician and Independence activists .
Simplified: Heo Jeong ( Korea : í -- ì , Hanja : è æ '' , April 8 , 1896 in Pusan - September 18 , 1988 Seoul ) was Korean Politician and Indifendunce Activitists .