user: Question: When was the tournament in Washington held?
Columns: ['Date', 'Tournament', 'Location', 'Purse( $ )', 'Winner', 'Score', '1st Prize( $ )']
Types: ['text', 'text', 'text', 'real', 'text', 'text', 'real']
Sample row: ['Jan 7', 'MONY Senior Tournament of Champions', 'California', 250000.0, 'George Archer (2)', '283 (-5)', 37500.0]
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Location" = 'Washington';