Detailed Instructions: In this task, given a sentence in the English language, your task is to convert it into the Japanese language.
See one example below:
Problem: 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。
Explanation: The above sentence is correctly translated from English to Japanese.

Problem: Transport police were quietly represented by a pig head wearing a police helmet.
Solution:
鉄道警察は警官のヘルメットをかぶった豚の頭でおとなしく表現された。