user: Question: How many different items appear in the high rebounds column in game 80?
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: [76.0, 'April 1', '@ Minnesota', 'W 111–92 (OT)', 'Dwyane Wade (32)', 'Chris Bosh (11)', 'LeBron James (10)', 'Target Center 19,096', '53–23']
SQL:

assistant: SELECT COUNT("High rebounds") FROM "Table" WHERE "Game" = 80.0;