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

### Instruction:
Which Year has a Competition of olympic games, and a Venue of atlanta, united states?

### Inputs:
table_name: table, columns: ['Year', 'Competition', 'Venue', 'Position', 'Event', 'Notes']

### Response:
SELECT AVG Year FROM table WHERE Competition = olympic games AND Venue = atlanta, united states