Simplify the following text for a Grade 9 native English-speaking person.
Original: The West German Federal government officially called West Berlin `` Berlin ( West ) '' , whereas the East German government commonly referred to it as `` Westberlin '' ; it began to use `` Berlin ( West ) '' only in the late 1980s .
Simplified: West Berlin was called `` Berlin ( West ) '' by the West Germany government , and usually by the East German government .