user: Question: How many high assist are on the date December 13?
Columns: ['Game', 'Date', 'Team', 'Score', 'High points', 'High rebounds', 'High assists', 'Location Attendance', 'Record']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [18.0, 'December 3', 'New York', 'W 118–82 (OT)', 'LeBron James (21)', 'Žydrūnas Ilgauskas , Anderson Varejão (10)', 'LeBron James (6)', 'Quicken Loans Arena 20,562', '15–3']
SQL:

assistant: SELECT COUNT("High assists") FROM "Table" WHERE "Date" = 'December 13';