user: Question: What was the away team's score at the game played at Lake Oval that had a crowd of over 15000?
Columns: ['Home team', 'Home team score', 'Away team', 'Away team score', 'Venue', 'Crowd', 'Date']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['Richmond', '23.15 (153)', 'St Kilda', '7.10 (52)', 'Punt Road Oval', 13000.0, '28 June 1947']
SQL:

assistant: SELECT "Away team score" FROM "Table" WHERE "Crowd" > 15000.0 AND "Venue" = 'Lake Oval';