In this task, given a sentence in the English language, your task is to convert it into the Japanese language.

Let me give you an example: Test subjects will be administered either a placebo or PA-457 that will be taken in combination with the medication they already take.
The answer to this example can be: 被験者は、彼らがすでに服用している薬剤と一緒に偽薬またはPA-457を与えられる。
Here is why: The above sentence is correctly translated from English to Japanese.

OK. solve this:
In a response to the letter, a 10 Downing Street spokesman said: "We should always remember that the terrorism affecting the West today has blighted Muslim countries for several decades.
Answer:
書簡に答えて、首相官邸のスポークスマンは、「今日西側に影響を及ぼしているテロリズムが数十年にわたってイスラムの国々を荒廃させたのを、我々は常に思い出さなければならない」と述べた。