 Complete the following phrase:  For a time after the Beatles contentious break-up, George Harrison was the most popular and successful of the former group. His November 1970 three-disc set, All Things Must Pass, was a sales triumph, and produced hit singles in My Sweet Lord and What Is Life. In the spring of 1971, Harrison learned from his friend and mentor, Ravi Shankar, about the desperate people of Bangladesh, who had been devastated both by military violence and a vicious 