Complex sentence: The term is modeled on the German word "wohltemperiert" that appears in the title of J.S. Bach's famous composition, "The Well-Tempered Clavier".
Split into simpler sentences: The term is modeled on the German word "wohltemperiert". This word also appears in the title of J.S. Bach's famous composition "Das wohltemperierte Klavier", "The Well-Tempered Clavier".