When the Berlin Wall fell in early November, 1989 Berlin's east and west sections were rejoined to create the third-largest city in Europe , with a population of about 3 million.
West Berlin ended in 1989
( z1 end :ARG1 ( z2 city :name ( z3 name :op "West" :op "Berlin" ) ) :time ( z4 date-entity :year 1989 ) )