user: Question: Name the record with opponent of Christian Nielson
Columns: ['Res.', 'Record', 'Opponent', 'Method', 'Event', 'Round', 'Time', 'Location']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Loss', '20–9–1', 'Renan Barão', 'TKO (spinning back kick & punches)', 'UFC 165', '2', '0:35', 'Toronto, Ontario , Canada']
SQL:

assistant: SELECT "Record" FROM "Table" WHERE "Opponent" = 'Christian Nielson';