user: Question: Which opponent completed a Challenge competition with a result of 8-2 W?
Columns: ['Date', 'Opponent', 'Venue', 'Result', 'Competition']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['13th', 'Telford Tigers', 'Home', '8-2 W', 'Challenge']
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Competition" = 'Challenge' AND "Result" = '8-2 W';