What year was a Rial Arc2 chassis used?
CREATE TABLE table_name_55 (
    year INTEGER,
    chassis VARCHAR
)
SELECT SUM(year) FROM table_name_55 WHERE chassis = "rial arc2"
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 year was a Rial Arc2 chassis used? ### Input: CREATE TABLE table_name_55 (
    year INTEGER,
    chassis VARCHAR
) ### Response: SELECT SUM(year) FROM table_name_55 WHERE chassis = "rial arc2"