In this article I got stuck by this sentence:
Die Echos bekommen Musiker, die mit ihren Liedern besonders erfolgreich sind.
If I am correct I can translate it (with the help of Google Translate) into English as
"The Echo prizes are awarded to those who are particularly successful with their songs.":
The Echo prizes are awarded to those who are particularly successful with their songs.
I am not familiar with the new grammar that "die mit"die mit leads a clause, especially the article die here. What is happening here?