Simplify the following text for a Grade 10 native English-speaking person.
Original: The westernmost part of the district was previously part of Mecklenburg-Western Pomerania , and changed to be part of Brandenburg on August 1 , 1992 .
Simplified: The westernmost part of the district was a part of Mecklenburg-Western Pomerania , and changed to be part of Brandenburg on August 1 , 1992 .