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_12 (date VARCHAR, year VARCHAR, loser VARCHAR, location VARCHAR)
### Question:
what date saw the chicago bears lose in green bay earlier than 1931?
### Answer:
SELECT date FROM table_name_12 WHERE loser = "chicago bears" AND location = "green bay" AND year < 1931