user: Question: What tournament is on 18 May 1992?
Columns: ['Outcome', 'Date', 'Tournament', 'Surface', 'Partnering', 'Opponent in the final', 'Score']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Winner', '16 September 1991', 'Geneva , Switzerland', 'Clay', 'Sergi Bruguera', 'Per Henricsson Ola Jonsson', '3–6, 6–3, 6–3']
SQL:

assistant: SELECT "Tournament" FROM "Table" WHERE "Date" = '18 May 1992';