1989 & ndash ; Ufa train disaster : A natural gas explosion near Ufa , Russia , kills 575 as two trains passing each other throw sparks near a leaky pipeline .
1989 - Solidaritys victory in the first partly free parliamentary elections in post-war Poland sparks off a succession of peaceful anti-communist revolutions in Eastern Europe .
1989 - Solidaritys victory in the first partly free parliamentary elections in post-war Poland sparks off a succession of peaceful anti-communist revolutions in Eastern Europe .
この段落を簡略化してください: 1989 & ndash ; Ufa train disaster : A natural gas explosion near Ufa , Russia , kills 575 as two trains passing each other throw sparks near a leaky pipeline . 出力: