Simplify the following text for a Grade 7 native English-speaking person.
Original: North-East England is one of the nine official regions of England and includes the combined area of Northumberland , County Durham , Tyne and Wear and a small part of North Yorkshire .
Simplified: North East England is one of the nine official regions of England . It covers Northumberland , County Durham , Tyne and Wear , and Teesside ( including parts of North Yorkshire ) .