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: Climate change is thought to have presented opportunities for the two species to mate now and then in the past 100,000 years.

SOLUTION: 気候変動が２つの種が過去１０万年のあいだに時々交配する機会を提供したと考えられる。

PROBLEM: The authors of the paper conclude that their evidence shows that matrilineal history of brown and polar bears suggest that "a likely genetic exchange with extinct Irish brown bears forms the origin of the modern polar bear matriline."

SOLUTION: 論文の著者は、これらの証拠が、ヒグマと北極グマの母系の歴史が「絶滅したアイルランドのヒグマとの遺伝子の交換が現代の北極グマの母系の起源をつくる」ことを示唆すると結論する。

PROBLEM: Vieira ends his Premiership stay after nine years in England since he became Arsene Wenger's first signing at Arsenal.

SOLUTION:
ヴィエラは、アーセナルのアーセン・ベンゲル初の契約選手になった時から9年後にイングランドでの彼のプレミアシップ滞在を終える。