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

### Instruction:
What is the average year that has a final Tour position of 54 and a final Vuelta position over 55?

### Inputs:
table_name: table, columns: ['Rider', 'Year', 'Final Position - Giro', 'Final Position - Tour', 'Final Position - Vuelta']

### Response:
SELECT AVG Year FROM table WHERE Final Position - Tour = 54 AND Final Position - Vuelta > 55