YOU SAID:
someone stole my polar bear
INTO JAPANESE
誰かが私のホッキョクグマを盗んだ
BACK INTO ENGLISH
Someone stole my polar bear.
INTO JAPANESE
誰かが私のホッキョクグマを盗んだ。
BACK INTO ENGLISH
Someone stole my polar bear.
That didn't even make that much sense in English.