user: Question: How large was the crowd when North Melbourne played as the away team?
Columns: ['Home team', 'Home team score', 'Away team', 'Away team score', 'Venue', 'Crowd', 'Date']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['Hawthorn', '15.14 (104)', 'Melbourne', '10.15 (75)', 'Glenferrie Oval', 26000.0, '1 April 1972']
SQL:

assistant: SELECT "Crowd" FROM "Table" WHERE "Away team" = 'North Melbourne';