user: Question: What is the average year that has a final Tour position of 54 and a final Vuelta position over 55?
Columns: ['Rider', 'Year', 'Final Position - Giro', 'Final Position - Tour', 'Final Position - Vuelta']
Types: ['text', 'real', 'real', 'real', 'real']
Sample row: ['Eduardo Chozas', 1990.0, 11.0, 6.0, 33.0]
SQL:

assistant: SELECT AVG("Year") FROM "Table" WHERE "Final Position - Tour" = 54.0 AND "Final Position - Vuelta" > 55.0;