CREATE TABLE table_737 ("District" TEXT, "Incumbent" TEXT, "Party" TEXT, "First elected" FLOAT, "Result" TEXT, "Candidates" TEXT)

what's the incumbent with district being north carolina 6
SELECT "Incumbent" FROM table_737 WHERE "District" = 'North Carolina 6'
SELECT "Incumbent" FROM "table_737" WHERE "District" = 'North Carolina 6'