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_74 (rank INTEGER, nationality VARCHAR, time VARCHAR)
### Question:
What's the lowest rank of the United States with a time less than 24.63?
### Answer:
SELECT MIN(rank) FROM table_name_74 WHERE nationality = "united states" AND time < 24.63