I want to know the answer to the following question:
Along with Barbra Streisand, the Carpenters, Dionne Warwick, Barry Manilow and Olivia Newton-John, what adult contemporary staple found it more difficult to score chart hits in the 1980s?
All the background I'm provided with is that "However, with the combination of MTV and AC radio, adult contemporary appeared harder to define as a genre, with established soft-rock artists of the past still charting pop hits and receiving airplay alongside mainstream radio fare from newer artists at the time.". Is that enough to answer the question?
Answer: no