user: Question: Which opponent has a record of 52-52?
Columns: ['Date', 'Opponent', 'Score', 'Loss', 'Record']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['July 1', 'Mets', '15 - 10', 'Rojas (3-2)', '43-41']
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Record" = '52-52';