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_name_3 (date INTEGER, length VARCHAR, builder VARCHAR)
### Question:
Which Date has a Length of feet 9inches (m), and a Builder of portland terminal company?
### Answer:
SELECT AVG(date) FROM table_name_3 WHERE length = "feet 9inches (m)" AND builder = "portland terminal company"