user: Question: What are the club number for the First round?
Columns: ['Round', 'Main date', 'Number of fixtures', 'Clubs', 'New entries this round']
Types: ['text', 'text', 'real', 'text', 'text']
Sample row: ['Preliminary round', '27 August 2008', 16.0, '48 → 32', 'none']
SQL:

assistant: SELECT "Clubs" FROM "Table" WHERE "Round" = 'First round';