Detailed Instructions: In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.
Q: Hungary opened its borders to citizens of East Germany on 11 September 1989 .
A:
On 11 September 1989 , Hungary opened its borders to citizens of East Germany and other Central European countries ; this was the first time a Central European border was opened to citizens of Eastern Bloc states .