What is "Того" in the Bratja(Братья) [Fullmetal Alchemist] ?

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I translate the lyrics of Bratja(Братья) into Japanese.
http://lyricstranslate.com/en/bratjabratya-fullmetal-alchemist-%E5%85%84...
What is "Того"?

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In this case means "who." The last two lines in the first verse could be translated in English like this: "There's no point to try to bring back one who has been taken by the Earth" Probably the meaning is clear but I'll make it more clear - One of the brothers has died and the other said this sentence.

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Well, from the text of the song it is not quite clear who has died whether it is a brother or a mother.

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Well, you're probably right. The mother has died, actually, but the translation is correct, anyway.

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Thank you very much.
Their mother has died.
I corrected my translation.