What is the average number of House of Representatives seats had an abbreviation of d66?
CREATE TABLE table_name_52 (
    house_of_rep_seats INTEGER,
    abbr VARCHAR
)
SELECT AVG(house_of_rep_seats) FROM table_name_52 WHERE abbr = "d66"
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What is the average number of House of Representatives seats had an abbreviation of d66? ### Input: CREATE TABLE table_name_52 (
    house_of_rep_seats INTEGER,
    abbr VARCHAR
) ### Response: SELECT AVG(house_of_rep_seats) FROM table_name_52 WHERE abbr = "d66"