user: Question: WHAT WAS Essendon'S HIGHEST CROWD NUMBER WHEN PLAYING 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: ['Fitzroy', '12.16 (88)', 'St Kilda', '9.11 (65)', 'Brunswick Street Oval', 17000.0, '4 May 1957']
SQL:

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