CREATE TABLE table_204_630 (id NUMBER, "no" NUMBER, "date" CLOB, "race" CLOB, "track" CLOB, "winner" CLOB, "reports" CLOB)

who was the top competitor at the carolina 500 ?
SELECT "winner" FROM table_204_630 WHERE "race" = 'carolina 500'
SELECT "winner" FROM "table_204_630" WHERE "race" = 'carolina 500'