You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
In this task, given a sentence in the English language, your task is to convert it into the Japanese language.

Test subjects will be administered either a placebo or PA-457 that will be taken in combination with the medication they already take.
Solution: 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。
Why? The above sentence is correctly translated from English to Japanese.

New input: The Obama administration is also trying to revise the Nuclear Nonproliferation Treaty to close loopholes that have been exploited by North Korea and Iran.
Solution:
オバマ政権はまた、北朝鮮とイラクによって悪用された抜け穴をふさぐために核拡散防止条例を改正しようともしている。