How many tries against were there when there was 961 points against?
CREATE TABLE table_15256 (
    "Club" text,
    "Played" text,
    "Drawn" text,
    "Lost" text,
    "Points for" text,
    "Points against" text,
    "Tries for" text,
    "Tries against" text,
    "Try bonus" text,
    "Losing bonus" text
)
SELECT "Tries against" FROM table_15256 WHERE "Points against" = '961'
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: How many tries against were there when there was 961 points against? ### Input: CREATE TABLE table_15256 (
    "Club" text,
    "Played" text,
    "Drawn" text,
    "Lost" text,
    "Points for" text,
    "Points against" text,
    "Tries for" text,
    "Tries against" text,
    "Try bonus" text,
    "Losing bonus" text
) ### Response: SELECT "Tries against" FROM table_15256 WHERE "Points against" = '961'