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_28 (heat INTEGER, mark VARCHAR, lane VARCHAR)
### Question:
What is the average heat that has 52.83 sb mark and lane less than 4?
### Answer:
SELECT AVG(heat) FROM table_name_28 WHERE mark = "52.83 sb" AND lane < 4