For the 2013 completion schedule, what is the total S.no.?
CREATE TABLE table_name_53 (
    sno INTEGER,
    completion_schedule VARCHAR
)
SELECT SUM(sno) FROM table_name_53 WHERE completion_schedule = "2013"
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: For the 2013 completion schedule, what is the total S.no.? ### Input: CREATE TABLE table_name_53 (
    sno INTEGER,
    completion_schedule VARCHAR
) ### Response: SELECT SUM(sno) FROM table_name_53 WHERE completion_schedule = "2013"