TASK DEFINITION: In this task, you are given a sentence in the English language and your task is to convert it into the Japanese language. In translation, keep numbers as it is and make it sentence case (capitalize only the first word of each sentence and noun).
PROBLEM: An angry crowd of around 600 protesters - some reports say thousands - gathered at Martyrs' Square, outside the presidential palace.

SOLUTION: 600人に及ぶ（いくつかの報告では数千人）怒った抗議の群衆が大統領宮殿の外側の殉教者広場に集まった。

PROBLEM: Meanwhile, the underlying rate of RPI increased from 3.8% to 4.6% over the same period.

SOLUTION: 一方、RPＩの潜在的な率も同じ期間に３．８％から４．６％に上がった。

PROBLEM: Defense Secretary Donald Rumsfeld faces a federal lawsuit brought today by the American Civil Liberties Union and Human Rights First, filed in his home state of Illinois.

SOLUTION:
ドナルド・ラムズフェルド国防長官は、アメリカ自由人権協会とHumanRightsFirstが彼の地盤であるイリノイ州で申し立て、本日提訴した連邦裁判に直面している。