what is the average b score when the gymnast is k hei uchimura ( jpn )?
CREATE TABLE table_13449 (
    "Position" text,
    "Gymnast" text,
    "A Score" real,
    "B Score" real,
    "Total" real
)
SELECT AVG("B Score") FROM table_13449 WHERE "Gymnast" = 'kōhei uchimura ( jpn )'
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 average b score when the gymnast is k hei uchimura ( jpn )? ### Input: CREATE TABLE table_13449 (
    "Position" text,
    "Gymnast" text,
    "A Score" real,
    "B Score" real,
    "Total" real
) ### Response: SELECT AVG("B Score") FROM table_13449 WHERE "Gymnast" = 'kōhei uchimura ( jpn )'