user: Question: Which event had Edson Claas Vieira as an opponent?
Columns: ['Res.', 'Record', 'Opponent', 'Method', 'Event', 'Location']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Loss', '3-9', 'Vinicius Lima', 'KO (punch)', 'Hard Fight Championship', 'Cuiaba , Mato Grosso, Brazil']
SQL:

assistant: SELECT "Event" FROM "Table" WHERE "Opponent" = 'Edson Claas Vieira';