I want to know the answer to the following question:
During what period were artists like Anne Murray and Barbra Streisand featured on Top 40 radio?
All the background I'm provided with is that "Also, some of these stations even played softer songs by Elvis Presley, Linda Ronstadt, Elton John, Rod Stewart, Billy Joel, and other rock-based artists.". Is that enough to answer the question?
Answer: no