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_1507423_4 (avg_finish VARCHAR, avg_start VARCHAR)
### Question:
What was the average finish when the average start was 18.4?
### Answer:
SELECT avg_finish FROM table_1507423_4 WHERE avg_start = "18.4"