user: Question: WHAT WAS THE HOME TEAM'S SCORE WHEN THEY HAD A CROWD GREATER THAN 20000 AND PLAYED AGAINST Collingwood?
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', '17.20 (122)', 'St Kilda', '7.14 (56)', 'Punt Road Oval', 12500.0, '28 May 1955']
SQL:

assistant: SELECT "Home team score" FROM "Table" WHERE "Crowd" > 20000.0 AND "Away team" = 'Collingwood';