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_26375386_28 (rank_by_average VARCHAR, couple VARCHAR)

### Question ###
How many ranks by average for the couple Tana and Stuart?

### Accurate SQL ###

SELECT COUNT(rank_by_average) FROM table_26375386_28 WHERE couple = "Tana and Stuart"