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_52 (house_of_rep_seats INTEGER, abbr VARCHAR)

### Question ###
What is the average number of House of Representatives seats had an abbreviation of d66?

### Accurate SQL ###

SELECT AVG(house_of_rep_seats) FROM table_name_52 WHERE abbr = "d66"