Simplify the following text for a Grade 8 native English-speaking person.
Original: Other major regional centers in Gelderland are Wageningen , Ede , Zutphen , Doetinchem , Harderwijk , Epe , Wijchen , Tiel and Zevenaar .
Simplified: Other important cities are Zutphen , Doetinchem , Harderwijk and Tiel .