What is earliest year that had a 50km event with a 2nd place result played in London, United Kingdom?
CREATE TABLE table_name_8 (
    year INTEGER,
    venue VARCHAR,
    event VARCHAR,
    result VARCHAR
)
SELECT MIN(year) FROM table_name_8 WHERE event = "50km" AND result = "2nd" AND venue = "london, united kingdom"
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 earliest year that had a 50km event with a 2nd place result played in London, United Kingdom? ### Input: CREATE TABLE table_name_8 (
    year INTEGER,
    venue VARCHAR,
    event VARCHAR,
    result VARCHAR
) ### Response: SELECT MIN(year) FROM table_name_8 WHERE event = "50km" AND result = "2nd" AND venue = "london, united kingdom"