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).

"The masks are like our calling card and we'll　never perform without them."
「仮面は我々の名刺のようなもので、それなしで演奏することは決してありません」

Researchers believe human trials may begin within a few years.
研究者らは、数年以内に人体治験が始まるかもしれないと信じる。

The reactor to be built is the second proposed power plant in the same location; a separate proposal for a four-reactor complex built by a Russian-led consortium was rejected by a Turkish court last year.

建設される原子炉は同じ場所に提案される発電所としては2つ目で、ロシア主導のコンソーシアムで建設する4つの原子炉の複合施設という別の提案は昨年トルコの法廷に拒否された。