Simplify the following text for a Grade 11 native English-speaking person.
Original: At independence in 1947 Kohat was a district of Peshawar Division , however in 1976 it became a separate division and contained the districts of Karak , Kohat and Hangu , kurram agency .
Simplified: At independence in 1947 Kohat was a district of Peshawar Division , however in 1976 it became a separate division and contained the districts of Karak , Kohat and Hangu .