Task: Text Simplification
Input (English): individual songs from some of the operettas have become standards , notably " vilja " from the merry widow and " you are my heart 's delight " -lrb- " dein ist mein ganzes herz " -rrb- from the land of smiles.
Output (English): certain songs from some of the operettas have become popular , especially " vilja " from the merry widow and " you are my heart 's delight " -lrb- " dein ist mein ganzes herz " -rrb- from the land of smiles.