Input (grade 12): The best known musical depictions of mermaids are those by Felix Mendelssohn in his Fair Melusina overture and the three "Rhine daughters" in Richard Wagner's Der Ring des Nibelungen.
Output (grade 12): The best known musical about mermaids are those by Felix Mendelssohn in his Fair Melusina and the three "Rhine daughters" in Richard Wagner's Der Ring des Nibelungen.