user: Question: Who was the opponent in UFC 19?
Columns: ['Res.', 'Record', 'Opponent', 'Method', 'Event', 'Round', 'Time', 'Location']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['Loss', '21–8', 'Rich Franklin', 'KO (punch)', 'UFC 115', 1.0, '4:55', 'Vancouver, British Columbia , Canada']
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Event" = 'UFC 19';