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 "By the early 1970s, softer songs by artists like The Carpenters, Anne Murray, John Denver, Barry Manilow, and even Streisand, began to be played more often on "Top 40" radio and others were added to the mix on many AC stations.". Is that enough to answer the question?