user: Question: Which away team played at MCG?
Columns: ['Home team', 'Home team score', 'Away team', 'Away team score', 'Venue', 'Crowd', 'Date']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['Essendon', '19.10 (124)', 'Melbourne', '16.24 (120)', 'Windy Hill', 14529.0, '23 April 1977']
SQL:

assistant: SELECT "Away team" FROM "Table" WHERE "Venue" = 'MCG';