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_27 (date VARCHAR, pos VARCHAR, venue VARCHAR)
### Question:
On which date was the position less than 4 at Piraeus?
### Answer:
SELECT date FROM table_name_27 WHERE pos < 4 AND venue = "piraeus"