Simplify the following text for a Grade 8 native English-speaking person.
Original: AntonÃ n Klimek ( January 18 , 1937 , Praha â `` January 9 , 2005 , Praha ) was Czech historian whose work focused mainly on history of Czechoslovak First Republic .
Simplified: AntonÃ n Klimek ( January 18 , 1937 in Prague - January 9 , 2005 in Prague ) was a Czech historian .