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_65 ( number_of_seasons_in_top_division INTEGER, number_of_seasons_in_prva_hnl VARCHAR )

### Question ###
Name the average number of seasons for Prva HNL of 17

### Accurate SQL ###

SELECT AVG(number_of_seasons_in_top_division) FROM table_name_65 WHERE number_of_seasons_in_prva_hnl = 17