CREATE TABLE table_18611 ("District" TEXT, "Incumbent" TEXT, "Party" TEXT, "First elected" FLOAT, "Result" TEXT, "Candidates" TEXT)

What is the first elected for south carolina 4?
SELECT "First elected" FROM table_18611 WHERE "District" = 'South Carolina 4'
SELECT "First elected" FROM "table_18611" WHERE "District" = 'South Carolina 4'