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 submarine was seen by Hanna Harge, a 40-year-old entrepreneur who lives locally, when walking with her dog on the morning of 13 April this year.
潜水艦は、今年4月13日の朝、その土地に暮らす40歳の企業家、HannaHargeによって、犬と散歩している時に発見された。

Mandushev went on to say, "Because of the planet's relatively weak pull on its upper atmosphere, some of the atmosphere probably escapes in a comet-like tail."
Mandushev氏は続けて、「この惑星は上空の大気に対し比較的引力が弱いために、大気の一部がおそらく彗星の尾のように放出されている」と言った。

The government's most important duty is to ensure the security of all Canadians.

政府の最も重要な任務はすべてのカナダ人の安全を保証することだ。