user: Question: On what date did the first match occur for the competition that ended with a final position of Winners and the final round in the Finals?
Columns: ['Competition', 'Started Round', 'Final Position', 'Final Round', 'First Match', 'Last Match']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Serie A', 'Round 1', '5th', 'Round 38', 'August 26, 2008', 'May 18, 2008']
SQL:

assistant: SELECT "First Match" FROM "Table" WHERE "Final Position" = 'Winners' AND "Final Round" = 'Finals';