user: Question: Which Surface had a Date of June 13, 1983?
Columns: ['Outcome', 'Date', 'Tournament', 'Surface', 'Opponent', 'Score']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Runner-up', 'November 6, 1982', 'Hong Kong', 'Clay', 'Catrin Jexell', '3-6, 5-7']
SQL:

assistant: SELECT "Surface" FROM "Table" WHERE "Date" = 'June 13, 1983';