What is the total against on 15/10/1999?
CREATE TABLE table_13053 (
    "Opposing Teams" text,
    "Against" real,
    "Date" text,
    "Venue" text,
    "Status" text
)
SELECT SUM("Against") FROM table_13053 WHERE "Date" = '15/10/1999'
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 the total against on 15/10/1999? ### Input: CREATE TABLE table_13053 (
    "Opposing Teams" text,
    "Against" real,
    "Date" text,
    "Venue" text,
    "Status" text
) ### Response: SELECT SUM("Against") FROM table_13053 WHERE "Date" = '15/10/1999'