user: Question: What was the size of the crowd when Essendon was 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: ['Collingwood', '12.13 (85)', 'St Kilda', '7.15 (57)', 'Victoria Park', 16500.0, '31 July 1954']
SQL:

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