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_57 (population INTEGER, rank_among_provinces INTEGER)
### Question:
What is the highest population for the province having a rank under 5?
### Answer:
SELECT MAX(population) FROM table_name_57 WHERE rank_among_provinces < 5