how long did it take to walk 50 km in the 2004 olympic games ?
CREATE TABLE table_203_874 (
    id number,
    "year" number,
    "competition" text,
    "venue" text,
    "position" text,
    "event" text,
    "notes" text
)
SELECT "notes" FROM table_203_874 WHERE "event" = '50 km walk' AND "year" = 2004
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: how long did it take to walk 50 km in the 2004 olympic games ? ### Input: CREATE TABLE table_203_874 (
    id number,
    "year" number,
    "competition" text,
    "venue" text,
    "position" text,
    "event" text,
    "notes" text
) ### Response: SELECT "notes" FROM table_203_874 WHERE "event" = '50 km walk' AND "year" = 2004