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: More than 300 people were watching as the whales set out to sea following a 30 hour rescue effort.
Solution:
30時間の救助作業の後でクジラたちが海に向かって出発する様子を300人以上が見ていた。