Миллисент
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The date of the Berlin Wall's destruction -> the fall of the 20th century wall. It's not certain if that's what was meant, but that's the first association.
On November 9, 1989, under the influence of mass popular protests, the government of the GDR lifted restrictions on communication with West Berlin, and on July 1, 1990, it completely abolished border controls. During January - November 1990, all border structures were demolished.
Added 4 minutes later
The wall was demolished in 1990... Among the players, only one was born in that year.