Simplify the following text for a Grade 13 native English-speaking person.
Original: It encompasses the combined area of Derbyshire , Leicestershire , Rutland , Northamptonshire , Nottinghamshire and most of Lincolnshire .
Simplified: The counties of Derbyshire , Leicestershire , Rutland , Northamptonshire , Nottinghamshire and most of Lincolnshire belong to this region .