user: Question: What is the location of the match with Chad Armstrong as the opponent?
Columns: ['Res.', 'Record', 'Opponent', 'Method', 'Event', 'Round', 'Time', 'Location']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['Win', '6-2', 'Rich Beecroft', 'Submission (kimura)', 'RITC 90 - Rage in the Cage', 1.0, '0:26', 'Arizona , United States']
SQL:

assistant: SELECT "Location" FROM "Table" WHERE "Opponent" = 'Chad Armstrong';