Task: Text Simplification
Input (English): in 1833 parts of burke county and buncombe county were combined to form yancey county , and in 1838 the southern part of what was left of buncombe county became henderson county.
Output (English): yancey county was formed from parts of burke county and buncombe county in 1833 . henderson county was formed from the remaining buncombe county in 1838.