John Prine, the raspy-voiced country-folk singer whose ingenious lyrics to songs by turns poignant, angry and comic made him a favorite of Bob Dylan, Kris Kristofferson and others, died Tuesday at Vanderbilt University Medical Center in Nashville, Tenn. He was 73. The cause was complications from Covid-19, his family said. Mr. Prine underwent cancer surgery in 1998 to remove a tumor in his neck identified as squamous cell cancer, which had damaged his vocal cords. In 2013, he had part of one lung removed to treat lung cancer.