user: Question: What date was the tournament that had a winner's share of $28,000?
Columns: ['Date', 'Tournament', 'Location', 'Winner', 'Score', "Winner's share ( $ )"]
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Jan 9', 'Glen Campbell-Los Angeles Open', 'California', 'George Archer (9)', '270 (–14)', '25,000']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Winner's share ( $ )" = '28,000';