I want to know the answer to the following question:
Along with Roger Miller and Barbra Streisand, who was a successful Easy Listening artist in this era?
All the background I'm provided with is that "As rock music continued to harden, there was much less crossover between the Hot 100 and Easy Listening chart than there had been in the early half of the 1960s.". Is that enough to answer the question?
Answer: no