What is the lowest 2nd (m) when the points were larger than 251.6?
CREATE TABLE table_36688 (
    "Rank" real,
    "Name" text,
    "Nationality" text,
    "1st (m)" real,
    "2nd (m)" real,
    "Points" real,
    "Overall FHT points" text,
    "Overall WC points (Rank)" text
)
SELECT MIN("2nd (m)") FROM table_36688 WHERE "Points" > '251.6'
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 lowest 2nd (m) when the points were larger than 251.6? ### Input: CREATE TABLE table_36688 (
    "Rank" real,
    "Name" text,
    "Nationality" text,
    "1st (m)" real,
    "2nd (m)" real,
    "Points" real,
    "Overall FHT points" text,
    "Overall WC points (Rank)" text
) ### Response: SELECT MIN("2nd (m)") FROM table_36688 WHERE "Points" > '251.6'