user: Question: December larger than 21, and a Opponent of Pittsburgh Penguins had what average game?
Columns: ['Game', 'December', 'Opponent', 'Score', 'Record']
Types: ['real', 'real', 'text', 'text', 'text']
Sample row: [26.0, 4.0, '@ Buffalo Sabres', '6 - 6', '9-14-3']
SQL:

assistant: SELECT AVG("Game") FROM "Table" WHERE "December" > 21.0 AND "Opponent" = 'Pittsburgh Penguins';