user: Question: who is the opponent when the method is TKO (Punches) at 4:26 of round 1?
Columns: ['Result', 'TUF Competitor', 'Opponent', 'Method', 'Event', 'Date']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Loss', 'Joe Stevenson', 'B.J. Penn', 'Submission (Rear Naked Choke) at 4:02 of round 2', 'UFC 80: Rapid Fire', 'January 19, 2008']
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Method" = 'TKO (Punches) at 4:26 of round 1';