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_51 ( year VARCHAR, bbc_two_rank VARCHAR )

### Question ###
In what year was BBC 2 13th in rank?

### Accurate SQL ###

SELECT year FROM table_name_51 WHERE bbc_two_rank = "13th"