What is the length of the race on August 15?
CREATE TABLE table_5129 (
    "Race" text,
    "Length" text,
    "Class" text,
    "Circuit" text,
    "Date" text
)
SELECT "Length" FROM table_5129 WHERE "Date" = 'august 15'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What is the length of the race on August 15? ### Input: CREATE TABLE table_5129 (
    "Race" text,
    "Length" text,
    "Class" text,
    "Circuit" text,
    "Date" text
) ### Response: SELECT "Length" FROM table_5129 WHERE "Date" = 'august 15'