user: Question: What kind of Crowd has a Ground of Subiaco Oval?
Columns: ['Home team', 'Home team score', 'Away team', 'Away team score', 'Ground', 'Crowd', 'Date']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['Carlton', '20.17 (137)', 'Collingwood', '7.7 (49)', 'M.C.G.', 16678.0, 'Friday, 31 December 1999']
SQL:

assistant: SELECT "Crowd" FROM "Table" WHERE "Ground" = 'Subiaco Oval';