user: Question: What is the away team score when the away team is Essendon?
Columns: ['Home team', 'Home team score', 'Away team', 'Away team score', 'Venue', 'Crowd', 'Date']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['Footscray', '5.9 (39)', 'Hawthorn', '9.21 (75)', 'Western Oval', 16794.0, '30 July 1960']
SQL:

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