user: ### NOW ANSWER:
Question: Which December has a Record of 21–6–5?
Columns: ['Game', 'December', 'Opponent', 'Score', 'Record', 'Points']
Types: ['real', 'real', 'text', 'text', 'text', 'real']
Sample row: [27.0, 4.0, 'Chicago Black Hawks', '7–5', '18–5–4', 40.0]
SQL:

assistant: SELECT AVG("December") FROM "Table" WHERE "Record" = '21–6–5';