user: Question: What is the event when the method was Submission (armbar), and Jeff Gibson was the opponent?
Columns: ['Res.', 'Record', 'Opponent', 'Method', 'Event', 'Round']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Win', '14-5', 'Robert Thompson', 'Submission (punches)', 'MFA - New Generation 3', '2']
SQL:

assistant: SELECT "Event" FROM "Table" WHERE "Method" = 'Submission (armbar)' AND "Opponent" = 'Jeff Gibson';