user: Question: What is the date of the winning score 74-67-71-73=285?
Columns: ['No.', 'Date', 'Tournament', 'Winning score', 'To par', 'Margin of victory', 'Runner(s)-up', 'Winners share ( € )']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text', 'real']
Sample row: [1.0, '9 Aug 1998', "McDonald's WPGA Championship", '71-69-67-69=276', '–12', '5 strokes', 'Helen Alfredsson Laura Davies', 45000.0]
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Winning score" = '74-67-71-73=285';