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_27 ( rating INTEGER, episode VARCHAR, rank__night_ VARCHAR, rank__timeslot_ VARCHAR )

### Question ###
What is the smallest rating with nightly rank smaller than 7, timeslot rank smaller than 5 and eposide after episode 6?

### Accurate SQL ###

SELECT MIN(rating) FROM table_name_27 WHERE rank__night_ < 7 AND rank__timeslot_ < 5 AND episode > 6