user: Question: Which team was the away team when home team was Essendon?
Columns: ['Home team', 'Home team score', 'Away team', 'Away team score', 'Ground', 'Date']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['North Melbourne', '2.6 (18)', 'South Melbourne', '1.2 (8)', 'MCG', 'Saturday, 3 August']
SQL:

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