user: Question: What is Set 1, when Set 2 is "21:18"?
Columns: ['Date', 'Score', 'Set 1', 'Set 2', 'Total']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['2 July', '0–2', '12:21', '13:21', '25:42']
SQL:

assistant: SELECT "Set 1" FROM "Table" WHERE "Set 2" = '21:18';