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Walk the Line
A chronicle of country music legend Johnny Cash's life, from his early days on an Arkansas cotton farm to his rise to fame with Sun Records in Memphis, where he recorded alongside Elvis Presley, Jerry Lee Lewis and Carl Perkins
Ref. https://www.imdb.com/title/tt0358273/
According to an online news article (CNN): Johnny Cash "was a poor sharecropper's son from Kingsland, Arkansas, who sang to himself while picking cotton in the fields -- then later sang to millions through recordings, concerts and his late-'60s TV variety show".