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_63 (length VARCHAR, class VARCHAR, date VARCHAR)
### Question:
Name the length for all class and date of march 18
### Answer:
SELECT length FROM table_name_63 WHERE class = "all" AND date = "march 18"