user: Question: What is the round number when the opponent was wrexham, and the venue shows as away?
Columns: ['Round', 'Date', 'Opponent', 'Venue', 'Result']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1.0, '9 August 2008', 'Rushden & Diamonds', 'Home', 'L 0-1']
SQL:

assistant: SELECT "Round" FROM "Table" WHERE "Opponent" = 'wrexham' AND "Venue" = 'away';