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

### Instruction:
What's the average year for the accolade 100 greatest singles of all time?

### Inputs:
table_name: table, columns: ['Year', 'Publication', 'Country', 'Accolade', 'Rank']

### Response:
SELECT AVG Year FROM table WHERE Accolade = 100 greatest singles of all time