Context: The term "classical music" did not appear until the early 19th century, in an attempt to distinctly canonize the period from Johann Sebastian Bach to Beethoven as a golden age. The earliest reference to "classical music" recorded by the Oxford English Dictionary is from about 1836.

Question: When did the term "classical music" appear? 
Answer: the early 19th century

Question: What period is referred to as a "golden age"?
Answer: the period from Johann Sebastian Bach to Beethoven

Question: What year is the earliest reference to 'classical music'?
Answer: 1836

Question: What book holds the earliest reference to 'classical music'?
Answer: Oxford English Dictionary

Question: What term did not appear until the early 19th century?
Answer: classical music

Question: What 'age' is the period from Johann Sebastian Bach to Beethoven referred to as?
Answer: golden age

Question: What year was the earliest reference to classical music?
Answer: 1836

Question: In what book was the earliest reference to classical music?
Answer: Oxford English Dictionary