Task: Translation
Input (Japanese): その大部分が子供達である少なくとも250人を輸送中の旅客列車が、火曜日の午後セルビア・モンテネグロで脱線し、峡谷に突っ込んだ。
Output (English): A passenger train carrying at least 250 people, many of whom were children, derailed in Serbia-Montenegro and drove into a ravine Tuesday afternoon.