user: Question: What is the score of the game with Grizzlies as the visitor team on 30 December 2007?
Columns: ['Date', 'Visitor', 'Score', 'Home', 'Leading scorer', 'Record']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['1 December 2007', 'Timberwolves', '80–109', 'Grizzlies', 'Rudy Gay (21)', '6–10']
SQL:

assistant: SELECT "Score" FROM "Table" WHERE "Visitor" = 'Grizzlies' AND "Date" = '30 December 2007';