TASK DEFINITION: In this task, you are given a sentence in the Japanese language and your task is to convert it into the English language. In translation, keep numbers as it is and make it sentence case (capitalize only the first word of each sentence and noun).
PROBLEM: 一方、フランドルの国家主義政党NVＡのヤン・ヤンボンが率いるフランドルの野党は、「フランドルの人々の多数を代表しない政府」だと、ファン・ロンパイ政府の合法性に疑問を呈した。

SOLUTION: Meanwhile, the Flemish opposition led by Flemish nationalist NVA party, Jan Jambon, challenged the legitimacy of Van Rompuy's government, calling it "a government which does not represent a majority of the Flemish people".

PROBLEM: 損害の報告はなかったが、気象庁によると、「今後海面の変化があるかもしれない」。

SOLUTION: There were no reports of damage, although, according to the Agency, "there may be slight sea level changes from now on."

PROBLEM: この事故による行方不明者３名のうち１人が発見されたが、未だ他の２人の消息はない。

SOLUTION:
One of the three people who were still missing from the accident was found, while there is yet no sign of the other two persons.