Who was the skip when the stolen ends against was 13?
CREATE TABLE table_20959 (
    "Country" text,
    "Skip" text,
    "W" real,
    "L" real,
    "PF" real,
    "PA" real,
    "Ends Won" real,
    "Ends Lost" real,
    "Blank Ends F/A" text,
    "Stolen Ends For" real,
    "Stolen Ends Against" real,
    "Shot %" real
)
SELECT "Skip" FROM table_20959 WHERE "Stolen Ends Against" = '13'
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: Who was the skip when the stolen ends against was 13? ### Input: CREATE TABLE table_20959 (
    "Country" text,
    "Skip" text,
    "W" real,
    "L" real,
    "PF" real,
    "PA" real,
    "Ends Won" real,
    "Ends Lost" real,
    "Blank Ends F/A" text,
    "Stolen Ends For" real,
    "Stolen Ends Against" real,
    "Shot %" real
) ### Response: SELECT "Skip" FROM table_20959 WHERE "Stolen Ends Against" = '13'