user: Question: Name the opponent with record of 12-18
Columns: ['Date', 'Opponent', 'Score', 'Loss', 'Record']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['May 1', '@ White Sox', '4 - 3 (10)', 'Speier (1-3)', '7-16']
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Record" = '12-18';