Tell me the sum of Year for outcome of runner-up for world darts championship
CREATE TABLE table_name_41 (
    year INTEGER,
    outcome VARCHAR,
    championship VARCHAR
)
SELECT SUM(year) FROM table_name_41 WHERE outcome = "runner-up" AND championship = "world darts championship"
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: Tell me the sum of Year for outcome of runner-up for world darts championship ### Input: CREATE TABLE table_name_41 (
    year INTEGER,
    outcome VARCHAR,
    championship VARCHAR
) ### Response: SELECT SUM(year) FROM table_name_41 WHERE outcome = "runner-up" AND championship = "world darts championship"