Document: List of best-selling albums in the United States.pdf
Question: What was the best-selling album in the U.S. before Michael Jackson's Thriller, and for how long did it hold this record?
Answer: Their Greatest Hits was the best-selling album in the United States, and it stayed the best-selling album in the U.S. for some years (1971–1975), until it was surpassed by Michael Jackson's Thriller.