Task: Explanation
Input (English): Daniel Grayling "Dan" Fogelberg (August 13, 1951 – December 16, 2007) was an American musician, songwriter, composer, and multi-instrumentalist whose music was inspired by sources as diverse as folk, pop, rock, classical, jazz, and bluegrass. He is best known for his early 1980s hits, including "Longer" (1980), "Leader of the Band" (1981), and "Same Old Lang Syne" (1981). Question: On which album did Dan Fogelberg's best know song, which had been released as a single 1980, appear? Answer: "The Innocent Age"
Output (English):  He is best known for his early 1980s hits, including Longer 1980, Leader of the Band 1981, and Same Old Lang Syne 1981.