CREATE TABLE table_5128 ("Race" TEXT, "Length" TEXT, "Class" TEXT, "Circuit" TEXT, "Date" TEXT)

What is the class of the Charlotte Camel gt 500 race?
SELECT "Class" FROM table_5128 WHERE "Race" = 'charlotte camel gt 500'
SELECT "Class" FROM "table_5128" WHERE "Race" = 'charlotte camel gt 500'