YOU SAID:
Fifty Centuries ago I was not a living human being.
INTO JAPANESE
50年前、私は人間ではありませんでした。
BACK INTO ENGLISH
Fifty years ago, I was not a human being.
INTO JAPANESE
50年前、私は人間ではなかった。
BACK INTO ENGLISH
Fifty years ago, I was not a human being.
That didn't even make that much sense in English.