Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_67 ( year INTEGER, final_position___tour VARCHAR, final_position___vuelta VARCHAR )

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

### Accurate SQL ###

SELECT AVG(year) FROM table_name_67 WHERE final_position___tour = 54 AND final_position___vuelta > 55