NASHVILLE, Tenn. (AP) 鈥� Nanci Griffith, the Grammy-winning folk singer-songwriter from Texas whose literary songs like 鈥淟ove at the Five and Dime鈥� celebrated the South, has died. She was 68. 聽Her management company says Griffith died Friday. Gold Mountain Entertainment did not provide a cause of death. Griffith, who often wove into her songs social