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_39 (finish INTEGER, team VARCHAR, start VARCHAR)
### Question:
What is the average Finish, when Team is "Buck Baker", and when Start is less than 13?
### Answer:
SELECT AVG(finish) FROM table_name_39 WHERE team = "buck baker" AND start < 13