Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_17697980_1 (no_of_episodes INTEGER, year VARCHAR)
### Question:
What is the largest number of episodes for a 1989 season dvd release? 
### Answer:
SELECT MAX(no_of_episodes) FROM table_17697980_1 WHERE year = "1989"