In this task, given a sentence in the English language, your task is to convert it into the Japanese language.
One example: Test subjects will be administered either a placebo or PA-457 that will be taken in combination with the medication they already take.
Solution is here: 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.

Now, solve this: John F. Kerry, the senator for Massachusetts was supposed to attend but could not due to voting on the economic stimulus package in Washington D.C..
Solution:
ジョンF.ケリー、マサチューセッツ州上院議員は出席すると思われていたが、ワシントンD.Cでの景気刺激策の採決の為にできなかった。