Sentence:  The planter aristocracy has appeared in literature at least since John Pendleton Kennedy published Swallow-Barn in 1832 and in his genial portrait of Frank Meriwether presiding over his plantation dominion initiated the most persistent tradition of <WSD>Southern</WSD> literature . 
Meaning of the word marked with <WSD> tags:  in or characteristic of a region of the United States south of (approximately) the Mason-Dixon line