user: Question: What is the Date, when the Opponent is Gisela Dulko?
Columns: ['Outcome', 'Date', 'Tournament', 'Surface', 'Opponent', 'Score']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Runner-up', '15 June 2008', 'Barcelona KIA , Barcelona, Spain', 'Clay', 'Maria Kirilenko', '6–0, 6–2']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Opponent" = 'Gisela Dulko';