Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
When did the opponent knockout Barry Prior in more than 2 rounds?

### Inputs:
table_name: table, columns: ['Date', 'Result', 'Opponent', 'Method', 'Round']

### Response:
SELECT Date FROM table WHERE Method = knockout AND Round > 2 AND Opponent = barry prior