What is Silver, when Notes is '6.24km, 23controls'?
CREATE TABLE table_12389 (
    "Year" real,
    "Gold" text,
    "Silver" text,
    "Bronze" text,
    "Notes" text
)
SELECT "Silver" FROM table_12389 WHERE "Notes" = '6.24km, 23controls'
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 Silver, when Notes is '6.24km, 23controls'? ### Input: CREATE TABLE table_12389 (
    "Year" real,
    "Gold" text,
    "Silver" text,
    "Bronze" text,
    "Notes" text
) ### Response: SELECT "Silver" FROM table_12389 WHERE "Notes" = '6.24km, 23controls'