user: Question: What date was the Singapore Gross 1999?
Columns: ['Date', 'Title', 'Director', 'Producer', 'Production Cost', 'Singapore Gross']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['1999', '1999', '1999', '1999', '1999', '1999']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Singapore Gross" = '1999';