I try to learn new vocab through song lyrics. And in the chorus of Nell's Separation Anxiety, he says according to the English translation: "I know that I am broken." or "I'm broken, I realize this." And when I look up the phrase "고장나버렸단 걸 알아요" I can't seem to find what 나버렸단 걸 means... 고장 means "failure" and 알아요 means "know" right? Thanks for the help!