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_3 (diameter__km_ INTEGER, latitude VARCHAR)
### Question:
What is the highest diameter when the latitude is 43.5s?
### Answer:
SELECT MAX(diameter__km_) FROM table_name_3 WHERE latitude = "43.5s"