Kwa nini kulikuwa na ukuta unaozunguka mji wa Berlin?
['Iligawanya Berlin kutoka 1961 hadi 1989 na pia kuzunguka na kutenganisha Berlin Magharibi kutoka kwa eneo la Ujerumani Mashariki']
Why was there a wall that surrounding the city of Berlin?
['divided Berlin from 1961 to 1989 as well as encircling and separating West Berlin from East German territor']