TASK DEFINITION: In this task, you are given a sentence in the English language and your task is to convert it into the Japanese language. In translation, keep numbers as it is and make it sentence case (capitalize only the first word of each sentence and noun).
PROBLEM: A CBC News survey found that the most expensive basic iPhone service was in Italy for Vodafone customers at an equivalent US$2554 for a two-year contract.

SOLUTION: CBCニュースの調べによると、最も高いiPhoneの基本料金はイタリアのボーダフォン顧客のもので、２年間契約で2554米ドルに相当する。

PROBLEM: Additionally, they determined that a drop in insulin production in the brain contributes to brain cell degeneration, a symptom of Alzheimer's.

SOLUTION: さらに、脳におけるインシュリン生成の減少が、アルツハイマー病の症状である脳細胞の退化を促進することを研究者たちは解明した。

PROBLEM: " As a somewhat nervous US citizen holed up in a hotel room in this massive South Asian metropolis, I decided to venture forth and see for myself."

SOLUTION:
「この南アジアの巨大都市のホテルの部屋に身を潜めていた、いささか神経質な１人のUS市民として、私は思い切って自分で外に出て見てみようと決心しました」