user: Question: What date was the opponent the Portland Trail Blazers?
Columns: ['Game', 'Date', 'Opponent', 'Score', 'Location', 'Record']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [58.0, 'Fri. Mar. 1', 'Charlotte Hornets', '87-100', 'FleetCenter', '31-27']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Opponent" = 'Portland Trail Blazers';