user: Question: Which opponent led to a 6-3 record?
Columns: ['Result', 'Record', 'Opponent', 'Event', 'Method', 'Round', 'Time']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Result', 'Record', 'Opponent', 'Event', 'Method', 'Round', 'Time']
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Record" = '6-3';