Simplify the following text for a Grade 7 native English-speaking person.
Original: San Fernando is the capital of the province of Colchagua , in central Chile , and the second most populated urban center of the O'Higgins Region .
Simplified: San Fernando ( in ) is the capital of the province of Colchagua , in the central zone ( central part ) of Chile . San Fernando is the second most populated urban center of the Region of O'Higgins .