Given the task definition and input, reply with output. In this task, you're given a statement, further information available on a particular linked term from the statement, and a question. Your job is to generate the answer to the question by using the information provided. If there is no clear answer obtainable, output 'none'.

Context: Ray Charles ("I Believe to My Soul"), Link Information: In 1983, Charles signed a contract with Columbia. He recorded a string of country albums and had hit singles in duets with singers such as George Jones, Chet Atkins, B. J. Thomas, Mickey Gilley, Hank Williams Jr., Dee Dee Bridgewater ("Precious Thing") and his longtime friend Willie Nelson, with whom he recorded "Seven Spanish Angels".
Question: Who was a famous country singer the original author I Believe to My Soul performed a duet with?
Answer: Willie Nelson