user: Question: What is the date when the tournament is San Diego and the opponent is Ann Grossman?
Columns: ['Outcome', 'Date', 'Tournament', 'Surface', 'Opponent', 'Score']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Winner', 'September 15, 1985', 'Salt Lake City', 'Hard', 'Camille Benjamin', '6-2, 6-4']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Tournament" = 'San Diego' AND "Opponent" = 'Ann Grossman';