user: Question: For what tournament is the 1990 0 / 4?
Columns: ['Tournament', '1987', '1988', '1989', '1990', '1991', '1992', '1993', '1994', 'Career SR']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Australian Open', 'A', '2R', '2R', '3R', '1R', 'A', '2R', '1R', '0 / 6']
SQL:

assistant: SELECT "Tournament" FROM "Table" WHERE "1990" = '0 / 4';