CREATE TABLE table_63483 ("Round" CLOB, "Main date" CLOB, "Number of fixtures" FLOAT, "Clubs" CLOB, "New entries this round" CLOB)

What are the club number for the first round?
SELECT "Clubs" FROM table_63483 WHERE "Round" = 'first round'
SELECT "Clubs" FROM "table_63483" WHERE "Round" = 'first round'