Simplify the following text for a Grade 11 native English-speaking person.
Original: On January 1 , 2005 , Lower Saxony disbanded its remaining four Regierungsbezirke : Braunschweig , Hanover , LÃ 1\/4 neburg , and Weser-Ems .
Simplified: On January 1 , 2005 , Lower Saxony disbanded its four Regierungsbezirke : Braunschweig , Hanover , LÃ 1\/4 neburg , and Weser-Ems .